Does the 4S shop need to sand off the original paint when repainting?

1 Answers
SanKylie
07/30/25 12:43am
When performing touch-up painting work, the 4S shop will sand the entire paint surface of the damaged area and then repaint the entire damaged section. Below are the relevant details: 1. Painting process: The original factory paint is designed to be compatible with the vehicle's metal body, and the factory painting process is quite meticulous. First, a special material is used to form an oxide film on the metal surface of the car, which enhances the metal's corrosion resistance. 2. Oxide film: The outer layer of the oxide film is the electrophoretic layer, which strengthens the metal's corrosion resistance and improves the adhesion of the primer. This is followed by the application of the primer layer, color layer, and clear coat. The color layer determines the car's paint color, while the outermost clear coat protects the color layer.
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