Yes Automotive sheet metal molding machine, commonly known as meson machine. The high resistance heat generated by low-voltage and high-intensity current flowing through two iron plates is used to melt the metal in the contact part, and they are fused together by the extrusion force of the welding gun electrode, so as to achieve the purpose of welding. When using meson machine to repair, the inner side will burn out the primer due to the high temperature generated by plate welding, which will lead to rust. So the meson machine will rust when it is repaired.