Do ceramic coatings fill scratches?
Quick answer: No, ceramic coatings do not fill in scratches. Ceramic coatings are very thin and optically clear, so they do nothing at all to hide scratches.
Ceramic coatings do not fill in scratches. Ceramic coatings are very thin and optically clear, so they do nothing at all to hide scratches.
This is why it is essential to prepare the car before application, polishing away any wash marks and buffing out scratches with paintwork correction. A ceramic coating will seal in the condition of the paintwork as it is, which is why we spend so much time making your car's paintwork perfect before application.
Other coatings are thicker, and many waxes contain fillers and diffusers to hide micro-scratches by diffusing light, so the marks are not so easy to see. But ceramic coatings are not like waxes -- they soak into the porous surface of the paintwork and coat it with a layer that is only molecules thick. This is extremely tough and will help reduce the risk of scratching in the future, so once your car is polished, within reason, it will help it stay looking polished.
How scratches actually get dealt with
There are only two honest outcomes. Light defects -- swirls, wash marring and very fine scratches -- are removed by machine polishing that levels the clear coat. Deep scratches that catch a fingernail are usually below the clear coat and need local paintwork. "Filling" is what waxes and glazes do optically; a ceramic coating is not designed to do that, and the wax-style fillers wear away within a few washes anyway.
If you want a swirl-free finish that lasts, the sequence is: decontaminate, machine polish to the level you want, then apply a ceramic coating to preserve that finish. After that, safe washing prevents you reintroducing the marks. Polishing a scratch out later will remove the coating in that area, so the coating then needs to be reapplied to that panel.
Why waxes can appear to fill marks (and ceramic coatings cannot)
Some traditional waxes and polymer sealants give a short-term cosmetic improvement because the product can sit in very fine surface marks and soften their appearance by diffusing the light bouncing off them. This is usually temporary -- a few washes later the defects return because the product has worn away. Ceramic coatings do not work this way: they are too thin, too optically clear, and too inert to fill anything. They preserve what is already there, good or bad, which is why correction has to happen first.
What it cannot do
- Not scratch-proof -- coatings reduce light wash-marring but do not stop stone chips or deep scratches.
- Not a filler -- the coating contains no fillers designed to mask defects, adds no meaningful thickness to the clear coat, and preserves whatever is already there.
- Not a substitute for polishing -- swirls and light marring are removable by machine polishing; deeper scratches you can feel with a fingernail may need more involved correction or paintwork. The coating is the final step, not the fix.
Ceramic coatings are semi-permanent -- they are not stripped with solvents or chemicals; meaningful removal or reset is mechanical. For the related "thickness" misconception, see is a ceramic coating thick like glass?