1) Sheet metal removal. Remove the sheet metal parts of the damaged part of the collision vehicle from the original body by cutting.

(2) Damage confirmation. After cleaning the damaged part, confirm the damage degree so as to establish the repair method.

(3) Remove the old paint film. Grind the original car paint on the damaged part until the iron plate layer is exposed.

(4) Leveling of sheet metal parts. According to the damage degree of sheet metal parts, use the corresponding sheet metal tools to flatten the concave parts. After leveling operation, the flatness of the surface of sheet metal parts should be fine-tuned.

(5) Fire extinguishing treatment. The tensile stress and extrusion stress produced in the process of restoring the original shape and thickness of metal are eliminated by fire extinguishing treatment, and the rigidity and strength of sheet metal parts are maintained.