1. Preparation before automobile door panel repair and wearing of labor protection articles. Labor protection articles can ensure the personal safety of door panel maintenance operators at work. Labor protection articles worn during operation include masks, goggles, working caps, earmuffs and cotton gloves. Determine the damaged area.

2. Repair and polish the damaged area of the door panel that is not seriously damaged. Grind the old paint film with a grinder. Stick No.80 sandpaper on the grinding head of the grinder, and pay attention to the hole of sandpaper corresponding to the hole of the grinding disc, so that the dust generated by the old paint film will be