If the 4s shop is used normally after painting, the car paint can last for 4-5 years, and the original paint of the 4s shop should be polished off.

A more formal repair shop will spray three layers of paint, namely, middle coat, color paint layer and varnish layer. The biggest difference from the original paint is that there is no electrophoretic layer. The electrophoretic layer needs to soak the vehicle in the paint pool, and then electrify it to make the paint adhere to the frame, which is also not available in general 4S shops and repair shops. The painting process of 4S shops and repair shops can be roughly divided into cleaning and polishing, primer (intermediate coating), painting, baking and polishing.