If the car is sunken due to collision, you can buy a set of drawing tools yourself and suck it with a sucker to repair it. But this kind of repair effect is not very good. At this time, it is necessary to use the dent repair lever tool to repair. However, this is a technical job that ordinary people can't do. A set of dent repair tools is worth thousands of dollars. Might as well go to the repair shop to have it repaired. Need to punch holes to repair dents without leaving traces: 1. I think car dent repair is different from sheet metal. The sheet metal is only roughly shaped, and the dent repair of the car needs to be slightly shaped while retaining the original car paint; 2. From the inside, the acting force should be directly exposed on the steel plate, without affecting the paint itself. However, most dents are quite serious, so the car paint will be uncovered directly with a glue stick. Because the glue stick will stick to the dent after heating, it will not damage the car paint during wire drawing. It's really easy to get into the business, but it's really difficult to do it well. Most car dent repair technicians can't see any problems from the front. When the light is strong, there will still be a slight dent from the side.