1. When welding, fix the removed fuel tank cover in the cab of the car body with iron wire, and require the fuel tank cover not to contact with the car body, and carry out pretreatment electrophoresis with the car;

2.

At the painting fixture exchange station, remove the fuel tank cover, and install the surface painting fixture of the fuel tank cover on the vehicle body for painting. The installation position of the fuel tank cover is also varied in many automobile main engine plants, some of which are placed in the window frame of the front door of the car body, and some are placed on the front windshield.