The sheet metal of the lower cross member of the door will affect the strength of the original steel, and the wax layer of the vehicle will be destroyed after the sheet metal is formed. The original wax layer is divided into an inner layer and an outer layer to achieve the purpose of anticorrosion, and the original wax layer flows because the sheet metal forming equipment is used to stretch the sheet metal.
In this way, the anti-corrosion layer is destroyed, and the daily painting of body panels is simple and anti-corrosive, which can not achieve the effect of the original car. It is recommended to carry out advanced anti-corrosion treatment.