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Car Care Glossary

An A-Z reference for ceramic coatings, paint protection, polishing, water leak detection, convertible roof restoration, and related car-care terminology. Part of the New Again Knowledge Base.

Jump to: 9 A B C D E F G H I L M N O P Q R S T U V W Z

9

9H Hardness = Scratch-Proof: 9H refers to the pencil hardness test (ASTM D3363) and means a cured coating resists being scratched by a 9H pencil under specified conditions. It does not mean Mohs 9 or that the surface is scratch-proof in real-world use.
9H (Pencil Hardness): “9H” is a result from the pencil hardness scratch test on coatings. It means the cured film resists being cut by a 9H graphite pencil under a specified load and angle. It is not the Mohs scale and does not mean scratch-proof paint.

A

Abrasive: An abrasive is a hard particle — aluminium oxide, silicon carbide, cerium oxide or a diminishing-abrasive polymer — suspended in a polish or compound that removes a micro-layer of clear coat to level swirl marks and defects.
Accredited Agent/Outlet: An Accredited Agent or Outlet is a detailing studio authorised by a coating manufacturer to apply their professional-grade product. Accreditation brings training, studio inspection and a manufacturer-backed warranty on the work.
Accredited Installer: An accredited installer is a detailing workshop that a coating manufacturer has vetted, trained and approved to apply their professional-grade coating and register the manufacturer-backed warranty.
Acid Washing: In car care, acid washing means using strong acidic cleaners on paint, wheels or glass to strip heavy contamination quickly - useful in specific cases but risky because it can etch or stain surfaces if misused.
Aftercare: Ceramic coating aftercare is the routine that keeps an installed coating performing correctly -- correct washing, periodic decontamination and occasional top-up products when the installer recommends them.
Algae: Algae is the slimy green film that grows on neglected areas of a car - especially soft tops, rubbers and trims - making them look dirty and holding moisture against the surface until it is properly cleaned away.
Antimicrobial: Antimicrobial treatments kill or inhibit bacteria, mould and mildew — typically silver, zinc, quaternary ammonium or peroxide chemistries. In water-damaged cars they are a standard step after drying, applied to carpets, soundproofing and the HVAC.
Aqua-Wax / Wash ’n’ Wax / Dry-wash / Show shine: These are quick-look maintenance products. Aqua-Wax is a spray-on wax used on a wet car during drying; Wash ’n’ Wax is shampoo with wax additives; Dry-wash is a waterless cleaner for very light dirt; Show shine is a gloss enhancer for a…
Automated Brush Wash vs Touchless: An automated brush wash uses rotating brushes/cloth for fast, friction-based cleaning – effective but can induce micro-marring. A touchless wash uses high-pressure water and stronger detergents with no brushes – gentler mechanically, harsher…

B

Base Coat: Base coat is the coloured paint layer sprayed over primer that gives the car its colour and any metallic or pearl effect, usually designed to be covered and protected by a clearcoat on top.
Beading: Beading is when water forms lots of small, round droplets on paint, glass or fabric, showing that the surface is strongly water-repellent and usually protected with wax, sealant or a coating.
Beading vs Sheeting: Beading is when water forms tight droplets on paint because the surface is very hydrophobic; sheeting is when water spreads and runs off in a continuous film. Both are valid behaviours and can be tuned by products.
Bio-Active: Bio-active usually describes cleaners or treatments that use biological action – such as enzymes or friendly microbes – to break down organic contamination like mould, mildew and odours in a car, rather than relying only on harsh chemicals.
Bird Droppings: Bird droppings are the acidic, often sticky mess birds leave on your car. If they are not removed quickly, they can stain or even etch into paint and soft tops, leaving permanent marks.
Bird Mess Etching: Bird mess etching is the dull imprint or stain left in your car’s paint after bird droppings have chemically burned into the clearcoat, so the mark remains even when the mess has been washed off.
Black Mould: Black mould is a dark fungal growth that appears on damp carpets, trims and hidden areas after a leak or flooding. It produces spores, smells musty and is a sign that materials have stayed wet long enough to need proper drying and…
Blanking Plate: A blanking plate is a panel or plug fitted over an unused hole in the bodywork — where a factory fitting has been removed or never installed (aerial, rear wiper, tow bar). When the seal fails, it becomes a direct water path into the car.
Blushing: Blushing is a milky, whitish cloud that appears in fresh paint or clearcoat when moisture gets trapped in the finish, usually because it was sprayed in air that is too cold or humid.
Polishing Bonnet: On a car, the bonnet is the hinged front panel that covers the engine bay – the part many people in other countries call the “hood”.
Box Section: A box section is a hollow structural part of the car’s body or chassis, like a sill or cross member, made from welded panels. It adds strength but can trap water and rust from the inside out if leaks or blocked drains let moisture sit in it.
Brake Dust: Brake dust is the fine dark residue that builds up on wheel faces, made from worn brake pad material and iron particles abraded from brake discs every time the brakes are applied.
Bubble Testing: Bubble testing is a leak-diagnosis method where the car or a cavity is gently pressurised and a soapy solution is applied to suspect areas outside – escaping air creates visible bubbles at gaps in seals, seams and fittings, showing where water…
Buffer Trails: Buffer trails are the curved, streaky marks left in paint by poor machine polishing, where fine scratches follow the path of the polisher and show up as ghostly lines in strong light.
Buffing: In car polishing, buffing is just another word for machine polishing, using a powered polishing pad and abrasive polish to boost gloss and soften light marks in the paintwork.
Buffing Pads: Buffing pads are the foam, microfibre or wool pads that attach to a machine polisher and carry the compound or polish over your car’s paint, controlling how hard it cuts and how well it finishes.
Bulkhead: Bulkhead is the British term for the metal panel that separates the engine bay from the cabin. Every pedal, wire, pipe and HVAC duct has to pass through it — each one a potential leak point if a grommet, seal or seam fails.
Burned Paint: Burned paint is localised damage where polishing, sanding or heat has overheated or cut through the clearcoat, leaving dull, discoloured or even bare patches instead of a glossy finish.
Business Contract Hire: Business contract hire (BCH) is a company car leasing arrangement where a business pays fixed monthly rentals to use a vehicle for an agreed term and mileage, with the contract in the company's name and partial VAT reclaim available.
BVRLA: BVRLA is the British Vehicle Rental and Leasing Association, the UK trade body whose Fair Wear and Tear Guide sets the industry standard every leasing company uses to assess your car when you hand it back at the end of the contract.

C

Cabriolet: A cabriolet is a car with a folding roof that lets you drive open or closed – in modern use it is essentially the same as a convertible, often with a fabric soft top and space for two or four passengers.
Carnauba: Carnauba is a hard natural wax from the leaves of the Brazilian carnauba palm. In car care it is blended into paste or liquid waxes to boost warmth, depth and hydrophobic behaviour, but it is a short-term, cosmetic protectant rather than a…
Car Paint Protection: Quick answer: Car paint protection is any sacrificial layer or physical barrier applied over the clear coat to preserve appearance and make cleaning easier.
Ceramic Coating: A ceramic coating is a silica-based protective layer that cures into a thin, clear, glass-like network on automotive paint. It improves chemical resistance, gloss and water behaviour and makes cleaning easier.
Ceramic Coating Service: A ceramic coating service is a professional process that prepares paint properly, applies a silica-based coating in thin, even layers, and manages cure so you leave with higher gloss, easier cleaning and tuned water behaviour.
Ceramic Fills Scratches: Myth. Ceramic coatings do not fill or remove scratches. They cure as a very thin, hard, clear film that can mask light haze slightly, but true scratches and swirls remain until they are polished out or refinished.
Ceramic Wax / Spray Sealant: A ceramic wax or spray sealant is a SiO2-enhanced topper that boosts gloss and water behaviour. It is easy to apply and great for maintenance, but it is not the same as a professional ceramic coating in durability or chemical resistance.
Chamois vs Microfibre Drying: A chamois is a flat leather or PVA sheet that squeezes water off paint but can drag and induce marring. A microfibre drying towel uses a plush or twisted pile to absorb and trap water and grit with less friction, so it is the safer, preferred…
Chemical Polish: A chemical polish is a liquid that cleans and brightens paint mainly with solvents, cleaners and fillers rather than strong abrasives, often adding gloss and hiding light marks for a short time rather than truly correcting them.
Clay Bar: A clay bar is a block of detailing clay used with lubricant to safely pull off bonded contamination from your car’s paint, glass and wheels that washing and normal chemicals cannot remove.
Clay Bar / Claying: Claying is a mechanical decontamination step that uses a clay bar, mitt or pad with lubricant to lift bonded contamination from paint, so the surface is smooth and ready for polishing or protection.
Clay Pads: Clay pads are rubberised decontamination pads that attach to a machine or hand applicator and work like a reusable clay bar, quickly removing bonded contamination from paint, glass and wheels when used with lubricant.
Clear Coat: Clear coat is the transparent lacquer layer on top of a car’s coloured paint that gives gloss and most of the protection, and is the part that is polished or corrected when you “machine polish the paint”.
Clear-over-Base: Clear over base is a two-stage paint system where a coloured basecoat is sprayed first and then sealed with a clearcoat lacquer on top, giving the car its colour, gloss and protection.
Coating Repair / Rework: Coating rework is the targeted correction of application defects – removing or blending high spots, fixing low or missed areas, and re-applying locally or panel-wide so the film cures uniform and looks clear again.
Combination Product: A combination product is a polish that lightly cleans away oxidised paint and leaves a wax or sealant behind, so you get cleaning and protection in one step.
Compound vs Polish: A compound is a cutting product designed to remove heavier defects by abrading the clear coat; a polish is a finer product for refining the finish, boosting gloss and removing light haze after compounding.
Contact Angle: The contact angle is the angle where a water droplet meets the surface - higher angles give tight beading, lower angles encourage sheeting.
Conventional Paint System: A conventional paint system is the traditional way of painting cars in layers - primer, solvent-based colour coat and a clear lacquer on top - as opposed to newer water-based or special high-tech systems.
Convertible Roof: A convertible roof is the movable top of a cabriolet or convertible car – usually a folding fabric, vinyl or metal roof – that can be raised or lowered so the car can be driven open or closed.
Convertible Roof Cleaner: A convertible roof cleaner is a specialist shampoo for soft tops, designed to remove algae, traffic film and dirt from fabric or vinyl roofs without harsh chemicals that can damage stitching, membranes or waterproofing.
Corrosion: Corrosion is the chemical attack on metal – usually rust on steel – caused by moisture, salt and oxygen. In cars it eats away at panels, seams and box sections from the inside out, especially where leaks or standing water have been left…
Cosmetic Repair: A cosmetic repair is a small, localised fix to the visible parts of a car – such as scuffs, scratches or minor dents – that improves appearance without involving major structural work or full-panel replacement.
Cross-linking: Cross-linking is the chemical reaction that joins coating molecules into a three-dimensional network, turning a liquid layer into a durable solid film with better hardness, chemical resistance and stability.
Cure Time: Cure time is how long a coating takes to reach key stages after application - from tack-free and handle-safe, to water-safe and fully cured with maximum chemical resistance.
Cutting Compound: A cutting compound is a strong abrasive polish used by machine to quickly remove heavier defects, sanding marks and oxidation from car paintwork before finer polishing stages.

D

Dead Paint: Dead paint is paint that has lost its oils, gloss and colour through age and weathering, so it looks flat, chalky and lifeless even after washing or a quick polish.
Decontamination: Decontamination is the process of removing bonded and embedded contamination from paint — using chemical and mechanical steps - so polishing and coatings can bond and perform properly.
Depreciation: Depreciation is the loss in a car's value over time, driven by age, mileage, condition and market demand. A new car can lose 20 to 30% of its value in the first year, and 50 to 60% over three years.
Devaluation: In leasing and PCP, devaluation is the drop in a car’s trade or auction value caused by damage, missing items or neglect beyond fair wear and tear. The leasing company recovers it through end-of-contract recharges.
Diamondbrite: Diamondbrite is a dealer-applied paint and interior protection system from Jewelultra. Its current two-stage nano/advanced ceramic treatments create a high-gloss protective skin and are backed by a UK lifetime guarantee when applied by approved…
Diamond Coating: “Diamond coating” is a marketing term for wipe-on, silica-based protectants that promise diamond-like hardness. They cure as a thin, clear film that improves gloss, chemical resistance and water behaviour.
Diminishing Abrasive: A diminishing abrasive is a polishing particle that starts off cutting quite strongly, then breaks down into finer particles as you work it, so the same polish cuts first and then finishes more gently.
Disturbed: Disturbed means a part, trim or seal has been previously removed, adjusted or tampered with so it is no longer in its original factory-fitted state - an important clue when diagnosing leaks, faults and the results of past repairs.
DIY: DIY in paintwork means doing prep, polishing, coating or proofing yourself with retail products. Works well for wash, wax and ceramic sprays; routinely goes wrong on machine polishing, correction and permanent coatings where mistakes are expensive.
Door Membrane: A door membrane is the plastic or foam sheet sealed behind a door card that acts as a water barrier, stopping rain that gets past the window seals from soaking the door trims and carpets inside the car.
Drainage: Drainage is the system of channels, gutters, drains and tubes built into a car to collect rainwater from roofs, windscreens and seals and route it safely back outside, instead of letting it run into the interior.
Drainage Pipes: Drainage pipes are the small plastic or rubber tubes that carry water away from sunroofs, scuttle panels and roof gutters to safe exit points under the car.
Drying: Drying is the controlled process of removing moisture from a car after leaks, flooding or heavy cleaning – not just on the surface, but from carpets, underlay, cavities and components – to prevent mould, corrosion, bad smells and future…
Dry sanding: Dry sanding is using abrasive paper or discs without water, usually by machine, to quickly level filler, primer or paint before refinishing or polishing.
Dual Action Polisher: A dual action polisher is a machine polisher whose pad both spins and orbits at the same time, making it safer and more forgiving than a rotary while still very effective at removing defects and boosting gloss on car paintwork.
Duck Hooding: Duck hooding is the traditional name for high quality, tightly woven cotton canvas that was used for convertible soft tops on pre-war cars, now mainly found on vintage vehicles being restored rather than on modern convertibles.
Durability: Durability is how long a protection product keeps doing its job in the real world – resisting chemicals, retaining gloss and maintaining beading/sheeting – before it needs topping up, rework or replacement.
Dwell Time: Dwell time is the amount of time a product is left on the surface to work before you agitate, rinse or wipe it off, so it can do its job properly without drying out or causing damage.

E

E-Coat: E-coat is the electrically applied anti-corrosion primer that a bare car body is dipped into at the factory, giving a thin, even protective layer for all the later paint and coatings to stick to.
ECU: The ECU (Engine Control Unit) is the main computer that runs a modern engine. Typically mounted on or near the bulkhead, it's vulnerable to water from failing scuttle drains and grommets. Damage causes non-start, rough running and expensive bills.
Elbow Grease: Elbow grease is the old-fashioned term for hard physical effort – scrubbing, polishing or cleaning by hand rather than relying on machines or very strong chemicals.
Electrical Problems: Electrical problems are faults in a car’s wiring, connectors, sensors or control units that cause things to stop working properly – often showing up as warning lights, intermittent glitches or flat batteries – and are frequently triggered or…
Endoscope Inspection Camera: An endoscope, or inspection camera, is a small camera on the end of a flexible cable that lets a technician see inside cavities, behind trim and under carpets, so they can trace leak paths, rust and wiring issues that are hidden from normal…
Enzymes: Enzymes are specialised proteins used in some bio-active car cleaners to break down organic residues – such as food spills, body fluids, mould films and odour-causing grime – so they are easier to rinse away without relying on very harsh…
Excess Mileage: Excess mileage is the per-mile charge a leasing or PCP finance company applies when a returned car has been driven beyond its contracted annual allowance. Rates are quoted in pence per mile and are fixed in the lease agreement.

F

Fabric Roof: A fabric roof is the woven soft top on many convertibles and cabriolets - usually a canvas or mohair-style material - that folds away and needs specific cleaning and proofing to stay waterproof, clean and presentable.
Fading: Fading is when paint, trim or interior materials lose colour and richness over time, usually from sun and weather, so they look washed out compared with how they were when new.
Fair Wear and Tear: Fair wear and tear is the BVRLA industry standard that separates the everyday ageing a leased car is allowed to show from damage the inspector will charge you for at the end of a PCP or contract hire agreement.
Fillers - Diffusers: Fillers and diffusers are ingredients in polishes and glazes that sit in fine scratches and scatter light, hiding swirls and haze so paint looks better without actually removing the defects.
Finishing Compound: A finishing compound is a very fine machine polish with low cutting power, used after stronger compounds to remove haze and holograms and leave the paintwork sharp, clear and glossy.
Fish Eye: A fish eye is a small circular crater in fresh paint or clearcoat where the coating has pulled away from a contaminated spot, often caused by silicone, oil or grease on the panel.
Flash Off: Flash off is the short period after you apply paint, clearcoat or a coating when the solvents evaporate and the surface changes from wet to dull or tacky, before you put on the next coat or wipe off the residue.
Flash Time / Open Time: Flash time is how long a coating takes to start evaporating solvents and show visual cues like rainbowing; open time is the workable window to level the coating before it begins to set. Many brands use the terms interchangeably.
Flat and Polish: Flat and polish is the process of sanding fresh paint flat with very fine abrasives to remove orange peel, dust nibs and runs, then machine polishing it back to a high gloss so the finish looks smooth and even.
Fluorescent Dye: Fluorescent dye is a special colouring added to test water that glows under ultraviolet (UV) light, so a technician can see and follow the exact path a leak is taking through panels, trims and cavities inside a car.

G

Glass Coating: “Glass coating” is a marketing term for silica-based ceramic coatings that cure into a thin, clear, glass-like network on paint. It is not a literal sheet of glass, but a microns-thin polysiloxane film that improves gloss, chemical resistance…
Glaze: A glaze is a non-durable finishing product rich in oils/fillers that visually hides fine swirls and amplifies gloss. It adds beauty but little protection, and is typically topped with wax or a sealant.
Gloss: Gloss is the ability of a painted or coated surface to reflect light back in a single direction. A high-gloss finish looks wet and mirror-like; a low-gloss finish looks flat or matte.
Graphene Coating: “Graphene coating” is a marketing term for hand-applied ceramic-style protectants that include graphene-oxide or carbon additives. They cure as a thin, clear film like other ceramics, improving gloss and water behaviour.
Grit: Grit is the fine dirt, dust and tiny hard particles that get trapped in a soft top roof. You may not see it, but it is abrasive and is one of the main causes of wear, thinning and eventual holes in convertible fabrics.
Grommet: A grommet is a moulded rubber seal fitted into a hole in bodywork, trim or a cable panel — every loom, pedal, cable or pipe crossing the bulkhead sits inside one. Grommets harden, split and drop out with age, turning each penetration into a leak.
Gtechniq: Gtechniq is a car care brand known for ceramic coatings and aftercare products for paint, glass, wheels and interiors, supplied for DIY use and via accredited professional installers.

H

Hand polishing: Hand polishing is applying polish, wax or glaze to your car’s paint by hand with a cloth or applicator pad instead of a machine, giving a light clean and extra gloss but only very limited scratch and swirl removal.
Hazing: Hazing is the dull, cloudy or milky look left in paint when fine scratches or micro-marring scatter the light, often after heavy compounding or poor polishing technique.
Headlining: Headlining is the trim that covers the inside of the car’s roof – usually a cloth or vinyl lining on a board – which hides wiring and insulation, and can stain, sag or go mouldy if there has been a water leak.
Helios Shield: Helios Shield is a hydrophobic nano-coating we apply to the car’s “nose cone” and other leading edges to make bug splatter, tar and road film release more easily.
High points: High points are the raised edges, body lines and curved areas of a panel that stick out slightly, so polishers and sandpaper hit them harder and the paint is thinnest and easiest to burn through.
High spot (ceramic coating): A high spot is a patch of ceramic coating that cured thicker than intended because excess residue wasn’t levelled off in time. It looks like a smudge, dark patch, rainbow smear or sticky sheen under raking light and usually needs prompt…
High Spots / Low Spots: High spots are patches of ceramic coating left too thick because they were not levelled in time; low spots are areas that received too little or no coating. High spots look smudged or rainbowy; low spots often show weak hydrophobics.
Hinges: Hinges are the pivoting joints that let parts like doors, boots, bonnets and convertible roofs open and close. If hinges wear, seize or move out of alignment, panels stop lining up properly, which can lead to leaks, wind noise and difficulty…
Holograms: Holograms are the curved, shimmery buffer trails left in paint by poor machine polishing, where fine scratches line up with the polisher’s movement and show as streaks and ghosts in strong light.
Hood: In this context, the hood is the folding roof assembly on a convertible or cabriolet, usually a fabric or vinyl soft top, that raises and lowers so the car can be driven open or closed.
Hybrid Product: A hybrid product is a wax, sealant or coating that mixes different protection technologies - for example carnauba wax with synthetic polymers or ceramic ingredients - to give a blend of gloss, durability and ease of use.
Hydrophobic Coating: A hydrophobic coating is a treatment that makes a surface strongly water-repellent so rain forms tight beads and runs off more easily, helping to keep paint, glass or fabric cleaner for longer and easier to dry.
Hydrophobic vs hydrophilic: Hydrophobic surfaces repel water (≥ 90° contact angle) so you see beading; hydrophilic surfaces (< 90°) make water spread. On cars, cured ceramic coatings are hydrophobic.

I

Industrial Fallout: Industrial fallout is tiny airborne pollution from factories, railways, brakes and other industry that lands on your car and bonds to the paint as rough specks, often rusty on light colours, that normal washing will not remove.
Inspection Light: An inspection light is a bright, focused handheld lamp used to reveal swirl marks, holograms and other paint defects that normal workshop lighting hides, so you can judge the true condition of the finish.
Iron Fallout Remover: An iron fallout remover is a chemical spray that reacts with iron particles embedded in paint, wheels and glass, turning them purple or red on contact so they can be rinsed away safely without abrasion.

L

Latches: Latches are the catches that hold panels like doors, boots and convertible roofs shut. On soft tops they pull the roof down onto its seals - if latches are worn, misadjusted or not closing fully, you can get leaks, wind noise or warning…
Latex: Latex is the rubbery backing and adhesive used on many car carpets, foams and trim fabrics. When a car has had a water leak it can soften, go sticky or crumble, trapping moisture and mould and often meaning carpets or soundproofing need…
Layering / Multiple Coats: Layering means applying more than one coat of a coating system. A second coat is usually added within the inter-coat window to improve coverage and uniformity, or a separate top coat is applied to tune slickness and water behaviour.
Lease Agreement: The lease agreement is the contract between you and the finance provider. It sets the mileage cap, the damage standard (usually the BVRLA guide) and the hand-back conditions that decide what you will and will not be recharged.
Lease Return Inspection: The lease return inspection is the formal end-of-contract check where an independent inspector grades a leased car against the BVRLA Fair Wear and Tear standard and lists any chargeable damage the finance company can recharge to the driver.
Levelling (Two-Towel Method): Levelling is the wipe-off step after applying a ceramic coating - you spread and remove excess with a first towel, then refine with a clean second towel to leave a thin, even film with no streaks or high spots.
Lichen: Lichen is the tough, crusty growth you see on neglected roofs, rubbers and trims - a slow-growing organism that bonds tightly to textured surfaces and is much harder to remove than simple green algae.
Lifting Carpets: Lifting carpets means physically raising or removing the car’s carpets and underlay so you can see and access the floorpan underneath – it is essential on leak and flood jobs because water and damage are often hidden below even when the surface…

M

Machine Polisher: A machine polisher is a powered tool that spins or oscillates a polishing pad, making it far more effective than hand work for removing defects and boosting gloss on car paintwork.
Machine Polishing: Machine polishing is using a powered polishing machine with abrasive polishes to level and refine your car’s paint so it looks glossier and hides light scratches and swirls.
Maintenance: Maintenance is the routine care, checks and servicing carried out on a car - from washing and inspections to scheduled repairs - to keep it safe, reliable and presentable, and to stop small issues turning into expensive problems.
Matrix Black: Matrix Black is a professional-grade ceramic coating brand used to protect automotive paint. It is installed after proper preparation to add gloss, chemical resistance and tuned water behaviour, and is typically supplied via accredited…
Mechanical Brush: A mechanical brush is a powered or machine-driven brush used in detailing to scrub surfaces such as fabric convertible roofs more evenly and deeply than by hand, helping to lift grit, algae and dirt without relying purely on elbow grease.
Membrane: In this context, the membrane is the hidden waterproof layer under a modern convertible’s fabric hood. The fabric is mainly cosmetic – it’s the membrane underneath that actually keeps the rain out.
Microfibre Cloth: A microfibre cloth is a synthetic towel (usually polyester/polyamide) with ultra-fine split fibres that lift dirt and water with low friction. The right pile, weave and edge make it safer on modern clear coats than cotton rags or chamois, and…
Micro-Marring: Micro-marring is the ultra-fine scratching or haze in the clearcoat – often from aggressive polishing or wiping – that makes paint look slightly dull or cloudy instead of crystal clear.
Mildew: Mildew is the light, powdery or fuzzy fungal growth that appears when parts of a car stay damp - often on seatbelts, fabrics, rubbers and hard trims - bringing musty smells and staining until the damp source is fixed and the interior is…
Mohair Roof: A mohair roof is a premium type of fabric soft top on a convertible, made from a tight-woven canvas-style material that gives a rich, tailored look and needs proper cleaning and proofing to stay waterproof and smart.
Moisture Meter: A moisture meter is a handheld instrument used to check how damp materials are inside a car, helping technicians see whether carpets, underlay, soundproofing and even the body shell are still wet after a leak, even when they feel dry on the…
Mopping: Mopping is an old trade term for machine polishing a car using a lamb's wool "mop" pad on a rotary polisher - you still hear it in workshops even though modern foam pads are more common.
Moss: Moss is the soft, spongy green growth that forms in clumps on neglected cars - especially around soft tops, rubbers and trims - holding moisture against the surface and being harder to remove than simple surface algae.
Mould: Mould is the fuzzy or slimy fungal growth that appears when parts of a car stay damp – usually on carpets, seats, headlinings and hidden areas – bringing musty smells, staining and potential health concerns until the damp source is fixed and…
Mould Inhibitor: A mould inhibitor is a treatment used after cleaning and drying a damp car to help stop mould and mildew growing back on fabrics, carpets and other surfaces. It helps keep smells at bay but cannot compensate for an unfixed water leak.
Autoglym Super Resin Polish: Autoglym Super Resin Polish (SRP) is a hand-friendly “all-in-one” cleaner polish that lightly abrades, fills/hides fine swirls with resins, and leaves a short-term protective layer.

N

Non-stick / PTFE claims: These are marketing claims that a wax or sealant contains PTFE (often branded “Teflon”) to make paint non-stick. PTFE can add slickness, but it does not form a cookware-style non-stick layer on car paint at room temperature.

O

Orange Peel: Orange peel is the slightly bumpy, dimpled texture in car paint or clearcoat that makes reflections look wobbly instead of glassy, caused by the way the paint was sprayed and dried rather than by dirt on the surface.
Oxidation: Oxidation is the way paint and plastics on a car slowly react with oxygen, UV and weather so the surface becomes dull, chalky and faded instead of glossy and rich in colour.

P

Paint Cleaner: A paint cleaner is a pre-wax product that deep cleans the paint, removes old wax and light oxidation, and leaves the surface ready for fresh protection.
Paint Depth Gauge: A paint depth gauge is an electronic meter that measures the thickness of a car’s paint in microns, so detailers and bodyshops know how much clearcoat they have to work with before polishing or sanding.
Paint Priming: Paint priming is the stage where primer is applied to bare metal, plastic or filler to seal, protect and prepare a panel before colour and clearcoat, ensuring good adhesion and a smooth, stable surface.
Paint Protection Film (PPF): PPF is a clear, self-healing polyurethane film applied to paint as a physical barrier against stone chips, scratches and staining while keeping the factory finish visible.
Paint Runs: Paint runs are sagging drips or curtains in fresh paint or clearcoat where too much material has flowed before drying, leaving raised, wavy lines that spoil the finish and usually need sanding and polishing to correct.
Paint Sags: Paint sags are areas where fresh paint or clearcoat has slowly drooped under gravity, leaving soft, wavy thickness rather than sharp drips, and usually need careful sanding and polishing to level out.
Paint Transfer: Paint transfer is when paint from another object - such as a bollard, post or another car - is rubbed onto your car’s surface, leaving a coloured scuff on top of the clearcoat rather than a deep scratch.
Paintwork: Paintwork is the vehicle’s painted finish as a system – primer, colour basecoat and clear coat – plus any repairs or repaints. Its condition and type determine how you wash, correct and protect the car.
Paintwork Correction: Paintwork correction is a careful machine polishing process that permanently removes or greatly reduces swirls, scratches and other defects in your car’s clearcoat so the paint looks deep, glossy and like new again.
Panel Wipe: Panel wipe is a fast-evaporating solvent cleaner used to remove oils, polish residue and silicones from paint so coatings, sealants or new paint can bond properly.
Panel Wipe / IPA Wipe: A panel wipe is a fast-evaporating solvent wipe, often IPA-based, used after polishing to remove oils, silicones and residue so coatings, PPF or paint can bond cleanly.
Personal Contract Hire: Personal contract hire (PCH) is a private car leasing arrangement where you pay fixed monthly rentals to use a car for an agreed term and mileage. The car is never owned; it is returned to the finance company at the end of the contract.
pH-Neutral Shampoo: A pH-neutral shampoo is a car wash soap that, at use dilution, sits around pH 7 so it cleans without stripping wax, sealants or ceramics and is gentle on trim and sensitive finishes.
Polish: Polish is a mildly abrasive liquid or cream used on car paintwork to clean, refine and boost gloss, usually before applying wax, sealant or a ceramic coating.
Polishing Compound: A polishing compound is a machine-applied polish with extra cutting power, available in different grades from coarse cutting to fine finishing to remove defects and refine your car’s paintwork.
Pollen Filter: The pollen filter (cabin filter) sits in the airflow between the scuttle and the cabin heater. Its housing is a common water-ingress point — a blocked scuttle drain can push water through the filter and into the footwell.
Polymer Coating / Sealant: A polymer coating or sealant is a synthetic paint protectant that forms a thin, durable film for gloss and water behaviour. It lasts longer than wax and is easier to apply than pro ceramics, but usually offers less durability and chemical…
Preparation: In paintwork and coating work, preparation is every step that gets paint fit to receive a product — wash, decontamination, clay-bar, iron and tar removal, correction, panel wipe. It determines how a coating bonds, how long it lasts and how it looks.
Pressure Washer Use: A pressure washer speeds up the pre-wash by removing grit before contact. Used correctly—right tip, distance and angle—it reduces wash marring. Used badly—too close, wrong nozzle, blasting edges—it can damage trims, films and force water past…
Primer: Primer is the preparatory paint layer applied to bare metal, plastic or filler to promote adhesion, provide corrosion protection and create a smooth, stable surface for the colour and clearcoat to go on top.
Professional Ceramic Coating: A professional ceramic coating is an installer-applied, silica-based system laid down in controlled conditions after full preparation. It delivers stronger chemical resistance, cleaner water behaviour and longer real-world durability than DIY…

Q

Quick Detailer (QD): A quick detailer is a spray used for light cleaning and gloss between washes - it removes light dust, fingerprints and water spots, adds slickness, and is generally safe on waxes and ceramic coatings.

R

Rail Dust: Rail dust is tiny iron particles, often from railways, brakes and industry, that embed themselves in your car’s paint and slowly rust into orange or brown specks that normal washing will not remove.
Rainbowing / Smear: Rainbowing is the iridescent, oil-slick sheen you see when a coating film is uneven or mid-flash; smear is the streaking or drag marks left by wiping too early, too thick, or with saturated towels.
Raking Light: Raking light is lighting aimed across a surface at a very shallow angle to reveal texture and defects by casting tiny shadows and highlights.
Random Orbital Polisher: A random orbital polisher is a type of machine polisher where the pad both spins and orbits in a random pattern, making it safer and more forgiving than a rotary while still effective at removing defects and boosting gloss on car paintwork.
Real Environment Test: A real environment test is when a car is checked for leaks or problems in normal use – out on the road and parked in real weather – to confirm that workshop tests and repairs actually work in day-to-day conditions.
Rear Vents: Rear vents are the hidden pressure-release vents in the back of the car – usually with rubber flaps behind the rear bumper or side trims – that let cabin air escape.
Recharge: In UK car leasing a recharge is the end-of-contract bill sent after the return inspection for damage beyond fair wear and tear, excess mileage or missing items. Nothing to do with charging an electric battery.
Removable Hard-Top: A removable hard top is a solid, non-folding roof that can be unbolted or unclipped from a convertible or roadster and stored, turning it from a closed car into an open one while leaving the rest of the body in place.
Removable Roof Panel: A removable roof panel is a solid section of roof that can be lifted out and stored to give an open-top feel, while the rest of the roof frame and pillars stay in place, as on many targa-style and sports cars.
Repaint / Respray Waiting Period: The waiting period is the time a fresh respray needs to off-gas solvents and finish curing before you apply protection (sealants/ceramics), fit PPF, or use strong chemicals.
Repair-and-Repaint: Repair and repaint means fixing damage to a panel – filling, sanding and preparing it – then respraying fresh paint and clearcoat, rather than trying to correct the original paint with polishing alone.
Replacement Roof Kit: A replacement roof kit is a set of new parts to re-trim a convertible’s soft top – usually the outer fabric and related pieces – supplied as a kit only and not including the labour to remove the old roof and fit the new one.
Retail Ceramic Coating: A retail ceramic coating is a DIY, wipe-on protectant that uses similar chemistry to professional ceramics but is tuned for easier application. It boosts gloss and hydrophobics and makes cleaning easier, but real-world durability and chemical…
Retail Product: A retail product is a car care product sold to the general public off the shelf, usually milder and more user-friendly than trade or professional products used by detailers and bodyshops.
Retractable Hard-Top: A retractable hard top is a folding metal or composite roof that stows away automatically – usually into the boot – so a car can switch between a closed hardtop and an open convertible at the press of a button.
Roadster: A roadster is a small, usually two-seat open sports car with a folding or removable roof, designed more for fun and sporty driving than for carrying people or luggage.
Roof Dye: Roof dye is a coloured coating or dye used to restore or change the colour of a faded fabric convertible roof, usually applied after deep cleaning and before proofing, to make the soft top look more even and presentable again.
Roof Green: Roof green is the informal way of describing a convertible or fabric roof that has gone green with algae, moss and general biological growth, making it look tired and often holding moisture and dirt against the material.
Roof Mechanism: The roof mechanism is the moving framework, motors, hydraulics and latches that open and close a convertible or retractable hard top. When it is worn, misaligned or faulty, the roof can jam, creak, leak or refuse to operate.
Roof Repair Kits: A roof repair kit is a DIY patch kit for damaged soft tops, usually including glue and fabric or vinyl patches. It can sometimes give a short term fix on small tears, but rarely restores the roof’s strength or appearance like a proper…
Rotary Polisher: A rotary polisher is a machine polisher whose pad spins in a single, fixed rotation, giving strong cutting power for removing defects but demanding more skill and care than a dual action polisher.
Rubber Reviver: Rubber reviver is a cleaner and conditioner for rubbers and weather seals that helps remove green growth and oxidation, darken them back up and keep them supple, but it cannot undo perishing, shrinkage or leaks caused by worn-out seals.
Rubbers: Rubbers are the rubber seals and trims around windows, doors, boot lids and convertible roofs. They help keep wind and water out, but if they dry, shrink or go green and crusty they can start to leak, squeak and look scruffy.

S

Sacrificial Barrier: A sacrificial barrier is a protective layer that takes the wear, chemicals and light marring instead of your clear coat. It is designed to be used up and renewed or replaced more easily than repairing paint.
Sacrificial Layer: A sacrificial layer is a protective product - such as wax, sealant, coating or film - that sits on top of your paint and is designed to take the wear, contamination and light marking so the finish underneath stays in better condition.
Scratches: On car paintwork, scratches are cuts or scores in the clearcoat and colour layers, ranging from light marks that only affect the surface to deep gouges that reach primer or bare metal.
Scuttle: The scuttle is the panel and cavity at the base of the windscreen, under the plastic grille and wipers, where rainwater and fresh air are collected and drained away.
Sealant: A sealant is a synthetic, polymer-based last-step protectant that forms a thin, slick layer on paint to boost gloss and water behaviour for weeks to months.
Self-Healing Coatings: In automotive care, “self-healing” most reliably refers to the elastic top coat on Paint Protection Film (PPF) that softens with warmth and lets fine swirls re-flow and disappear.
Semi-Permanent Coating: A semi-permanent coating is a wipe-on protective film that chemically bonds to paint and lasts much longer than wax or a simple sealant, but is still a sacrificial layer that will wear and can be removed or corrected.
Service Book: The service book is the record of scheduled servicing that travels with a lease car and must be produced at hand-back. Modern cars increasingly use a digital service record instead, but the expectation is the same — a complete, stamped history.
Service History: Service history is the documented record of every scheduled service a car has received — the state of being maintained on schedule. At lease return, gaps or missing stamps can trigger recharges or valuation drops.
Silicone / siloxanes (vs silica): Silicones/siloxanes are man-made oils and polymers used for slickness and water behaviour; silica (SiO2) is an inorganic oxide that forms the glass-like ceramic network in coatings. They are different chemistries and do different jobs.
SiO₂ (silicon dioxide): SiO2, also called silicon dioxide or silica, is the ceramic backbone used in many automotive coatings - when it cures it forms a thin, glass-like network that bonds to the clear coat and improves gloss, chemical resistance and water behaviour.
SMART Repair: SMART (Small to Medium Area Repair Technique) is a localised cosmetic body repair method used to fix scratches, dents, bumper scuffs and kerbed alloys without full panel refinish — typically mobile, same-day, and much cheaper than a bodyshop.
Smoke Testing: Smoke testing is a leak-diagnosis method where harmless visible smoke is pumped into a car or cavity so you can see exactly where it escapes, helping to trace water paths, air leaks and gaps in seals, membranes and vents that are otherwise hard…
Soft Top: A soft top is a convertible roof made from flexible material � usually fabric or vinyl � that folds or retracts so the car can be driven open or closed, and needs specialist cleaning and care to stay waterproof and tidy.
Solid Colour: Solid colour is a non-metallic paint finish where the car’s colour comes from a plain pigmented layer with no metallic or pearlescent flake, so it looks like a flat, even colour – often still protected by a clearcoat on modern cars.
Solvent Migration: Solvent migration is when trapped solvents slowly move out of lower paint layers into the topcoat, causing loss of gloss, shrinkage, edge-mapping or staining as the finish continues to dry and settle.
Spoor - Trace: Spoor, or trace, is the visible trail that leaking water leaves inside a car - tide marks, dirt lines, staining, rust or dyed water - which a technician can follow to track the route of a leak from where it gets in to where it ends up.
Stains: Stains are discolourations on paint, glass, wheels or interior surfaces where something has reacted with or soaked into the material, leaving a mark that normal washing or vacuuming will not remove.
Sticky Paint: Sticky paint is paintwork – usually soft or not fully cured clearcoat – that grabs at polishing pads and cloths, making polish drag, smear and gum up instead of wiping or buffing off cleanly.
Sunroof Cassette: A sunroof cassette is the complete framed unit that sits inside the roof skin and holds the sunroof glass, mechanism and drains - it acts like a tray and gutter, letting a little water past the outer seal but catching it and sending it away…
Supagard: Supagard is a dealer-applied paint and interior protection brand. It’s typically a polymer sealant system applied at or after PDI to add gloss and short-to-medium-term protection, with optional fabric/leather guards.
Surface Energy: Surface energy is how much a solid surface “wants” to attract or repel liquids – high surface energy wets easily, low surface energy resists wetting and promotes beading.
Swirl Mark: Swirl marks are the fine, circular scratches in your car’s clearcoat that show up as a spider-web pattern around light sources, usually caused by poor washing, drying or polishing technique.
Swirl Remover: A swirl remover is a polish or compound sold to reduce or remove swirl marks in paint. Some are true abrasive products that cut the clearcoat flatter, while others mainly hide swirls with fillers and oils so the improvement is partly temporary.
Synthetic Wax (Polymer Sealant): At New Again, “synthetic wax” means retail polymer sealants used like a wax for weeks-to-months protection. “Polymer sealant” means the semi-permanent dealer/installer systems (e.g., Supagard, ToughGuard, Diamondbrite) that are applied after…

T

Tar Remover: A tar remover is a solvent-based cleaner that dissolves bitumen spots, adhesive residue and traffic tar so they wipe away without heavy scrubbing, reducing the risk of marring before polishing or protection.
Tears: Tears are rips or holes in a fabric convertible roof, usually along fold lines where the material has worn thin, and once they appear the roof often needs repair or replacement rather than just a simple clean.
TFR Traffic Film Remover: TFR (traffic film remover) is a strong pre-wash chemical used to strip oily road film and heavy grime from vehicles, usually before shampooing, and must be diluted and used carefully because it can also remove wax and damage sensitive surfaces.
Threshold: In end-of-lease inspections a threshold is the BVRLA size limit above which a scratch, chip, dent or scuff becomes a chargeable defect — for example scratches over 25mm or dents over 15mm across.
Top-Up Product: A top-up product is a quick, maintenance-friendly layer used after washing to refresh gloss, slickness and water behaviour on top of existing protection. It’s fast to apply and extends day-to-day performance but is not a full re-coat.
Top-up / Topper / Booster: A topper (also called a top-up or booster) is a quick-apply product used to refresh gloss, slickness and water behaviour on protected paint. It sits on top of waxes, sealants or ceramics and is part of regular aftercare, not a full re-coat.
Toughguard: ToughGuard is a brand of nano-resin surface protectants with aerospace certifications. Its range includes a long-life barrier coat (“Step 2”) and a consumer spray (“SpeedGuard”) positioned as quick, ceramic-style protection for paint, gel-coat…
Trade Products: Trade products are car care chemicals and polishes made for professional use in bodyshops and detailing studios, usually stronger, more concentrated and more system-based than the gentler retail products sold to the public.
Traffic Film Remover (TFR): TFR is a strong pre-wash detergent that cuts through road film, oils and grime. It cleans quickly but can reduce or strip waxes and sealants if used strong or too often, so dilution, dwell time and technique are critical.
Transport Wax: Transport wax (also called transit wax) is a temporary protective coating applied to new cars for shipping and storage. It must be removed during pre-delivery inspection (PDI) to avoid bonding issues and staining.
Turtle Wax: Turtle Wax is a well-known retail car care brand offering waxes, sealants, “hybrid ceramic/graphene” sprays, shampoos and interior products. It’s widely available, good for DIY maintenance, and spans traditional paste waxes through to modern…

U

Ultrasonic Leak Detector: An ultrasonic leak detector is a tool that uses high frequency sound to find tiny gaps and leak paths in a car’s body, seals and glass – you put a transmitter on one side and a sensor on the other, and any sound that gets through points to…
Underseal: Underseal is a protective coating applied to a vehicle’s underside and wheel arches to guard against corrosion, stone impact and road salt. Done properly on clean, dry metal with the right product, it slows rust and can reduce noise.
Upholsterer: An upholsterer is a trades specialist in stitched, bonded and trimmed soft materials — fabric, vinyl, leather, foam. In convertible-roof work they re-stitch seams, replace panels and rebuild hoods where proofing and repair can no longer save them.
UV Inhibition: UV inhibition is a material’s ability to resist damage from ultraviolet light – slowing colour fade, chalking and clear-coat breakdown by using UV absorbers and light stabilisers.

V

Vinegar (Acetic Acid): Vinegar is a dilute solution of acetic acid used as a mild acid cleaner. It can dissolve fresh mineral water spots and neutralise alkaline residues, but it can also mute hydrophobics, strip waxes and harm sensitive materials if misused.
Vinyl Roof: A vinyl roof is a smooth, non-woven soft top made from plastic-coated material, used on some convertibles and older saloons, which wipes clean more like plastic trim and does not need fabric proofing but still needs regular cleaning and UV…

W

Wash Marks: Wash marks are the fine, light scratches put into your car’s clearcoat by washing and drying – the “swirl” lines you see in sunlight that come from dirty sponges, brushes or poor wash technique.
Water Damage: Water damage is the harm caused when water gets into parts of a car that are meant to stay dry – soaking carpets, wiring, trim and structure – leading to corrosion, mould, bad smells and electrical faults long after the original leak or flood.
Water Spots: Water spots are the marks left behind when water droplets dry on your car and leave mineral deposits or etching in the paint or glass, showing as round, patchy spots that can be stubborn to remove.
Water Spots / Mineral Deposits: Water spots are the marks left when hard water dries on paint or glass. They range from loose mineral deposits you can dissolve and wipe away to true etching where minerals or alkaline residues have marked the surface and require polishing to…
Car Wax: Car wax is a wipe-on protective layer – traditionally carnauba-based, now often blended with polymers – that boosts gloss and slickness and adds short-term water behaviour.
Wear Marks: Wear marks are the shiny, rubbed or thinned patches you see on soft tops, paint and trims where grit and repeated movement have gradually abraded the surface, showing early signs that the material is wearing out.
Weather Proofer: A weather proofer is a specialist treatment applied to fabric convertible roofs to help them repel water and dirt. It restores water beading and slows down roof greening, but it does not repair damage or replace the hidden waterproof membrane.
Weather Proofing: Weather proofing is the process of treating a fabric convertible roof so it sheds water and dirt more easily – usually by applying a dedicated proofer after deep cleaning – to slow down roof greening and surface wear, but it does not repair…
Weather Stripping: Weather striping refers to the rubber and foam strips fitted around doors, windows, boots and roofs to seal out water, wind and noise - if these strips shrink, harden or come loose, the car can leak and whistle even though the metalwork looks…
Wet Polishing: Wet polishing is machine polishing with extra water or a watery compound to control heat, reduce dust and help refine paint after sanding so it finishes to a smooth, high gloss.
Wet sanding: Wet sanding is using very fine wet-and-dry sandpaper with water to level paint defects before polishing, so scratches, etching and orange peel can be removed more evenly and quickly than by polishing alone.
White Grease: White grease is a pale, usually sprayable lubricant that dries to a thick, water-resistant film on hinges, latches and other moving parts, used where ordinary oils would run off or wash away.
Windscreen Leaks: Windscreen leaks are water leaks caused by the glass not sealing properly to the body of the car, so rain tracks past the screen seal or bonding and ends up inside the cabin, usually in the front footwells, behind the dash or down the A-pillars.

Z

Zig-Zags: Zig-zags are the pale, angled lines you see across a soft top where it has repeatedly folded in the same places, usually where grit and movement have begun to mark and thin the fabric along the roof’s fold pattern.

Authored by Danny Argent. Reviewed by Gary Wray.