1、 Shallow scratch: due to improper friction and daily care, there are slight scratches on the paint surface, but the primer is not exposed. This kind of scratch is more obvious in the sun. Usually removed by polishing.
2、 Fading: oil fume and pollutants in the atmosphere are the main reasons for the discoloration and fading of car paint. Fading is different from oxidation. When fading occurs, the paint will have uneven color difference. Moderate and mild discoloration can be treated by grinding and polishing, and repaint in case of serious discoloration.
3、 Water mark: water mark is the mark left by the evaporation of water droplets, which is circular. Cars that are oxidized and commonly cleaned with detergent are easy to get water marks.
4、 Paint oxidation: under the sun's ultraviolet radiation, the paint film will continuously evaporate oil into the air to protect itself, which will lead to excessive loss of paint oil for a long time. The brightness of the paint is greatly reduced, which makes the paint white slowly and forms an oxide layer, which shortens the service life of the car paint. If the oxidation is serious, it can be treated by grinding and polishing.
5、 Etch marks: etch marks are surface abrasion. Insects, bird droppings, tree sap, tar and asphalt may cause corrosion marks. Slight corrosion marks can be solved by grinding and polishing.