Water Spots
Water spots, watermarks, or hard watermarks are most often caused when calcium in water forms droplets and the calcium or limescale forms a ring around the edge of the droplet.
This will leave limescale rings on the car, which can be removed with a watermark remover, however, as the limescale is forming, there is a caustic reaction which can cause etching to paintwork and glass which may require polishing to remove.
Rainwater is naturally soft, and therefore wants to absorb minerals that are on your car's paintwork. The issue of watermarks can be far worse when the car is contaminated with dust, cement or plaster powder as these can be highly reactive.
Written by Danny Argent. Last updated 25/01/2024 13:52