You'd better polish the car before painting. Polishing can remove small scratches and oxide layers indicated by paint, making the car brighter and smoother. And then coated.
The coating forms a protective film on the surface of the car paint to protect the car paint for a long time. The advantage of coating is that it provides more long-term protection than traditional paint protection technologies such as waxing and glaze sealing, and it is a paint protection product with a long aging ratio after one operation.
The coating is a product of several years ago, and now it is crystal plating on the market, which increases the hardness of the paint surface.