Car paint like the human skin, acid rain, oxides, ultraviolet like bacteria would attack the car's "skin". Now, the importance of car paint care has been taken seriously.
Car paint is normally provided by electrolysis paint, primer, color paint, from the chemical composition point of view, the development of automobile paint through three stages, 1920s alkyd (magnetic) paint, 60s acrylic acid (magnetic) paint, 80s mirror varnish. But do you really know varnish? clear coat layer has two effects: first, increase the brightness and shininess, the second is to protect the paint layer.