The process of sheet metal painting is complex, and the whole process takes a long time, so it is impossible to complete the car hoisting in one day. If the damaged area of the vehicle is large, the time will be further extended. It takes at least two or three days to repair a noodle in a 4s shop. The details are as follows: 1, automotive sheet metal: automotive sheet metal is a technical means of automobile maintenance. In this respect, automotive sheet metal is equal to automotive sheet metal's repair, which means that the car body should be repaired after the collision, that is, all the work except the anti-corrosion and decorative spraying of the car body. Such as body damage analysis, body measurement, shaping, stretching, correction, stress relief welding, assembly adjustment of body accessories, etc. 2. Technology: automotive sheet metal is a processing method of automobile maintenance, also called cold working. To put it bluntly, if the appearance of the car body is damaged and deformed, the sheet metal process is needed.