It takes 2-3 days to spray paint in automotive sheet metal. If the damaged area of the vehicle is large, the time will be further extended. Sheet metal painting refers to the plastic repair of the deformed place where the vehicle collides, returning to the state before being hit, and then restoring its color and luster. The workflow consists of five steps: scheme determination, sheet metal shaping, scraping shaping, painting and paint surface treatment: scheme determination: before starting sheet metal painting, it is necessary to determine the repair scheme according to the damage degree of the vehicle, and different solutions will be taken to different degrees; Sheet metal shaping: cutting, grinding, stretching, fire extinguishing, deoxidation at deformation. Sheet metal should not only restore the original appearance of the vehicle, but also keep the hardness of the metal material as much as possible; Scraping and shaping: after the sheet metal is corrected, it is necessary to shape the waistline of the car body and adjust its flatness by scraping and shaping the car body; Spraying car paint: The process of spraying car paint is quite complicated, which requires many processes such as spraying the first primer, intermediate primer, paint mixing, spraying top coat and drying car paint, and must be carried out in a dust-free environment; Car paint treatment: use fine beauty sandpaper or polishing machine to restore the luster of the car body.