Car door repair techniques

The repair techniques for car doors mainly involve correction and repair when the car door frame is twisted or deformed. The main repair methods for damage to the car door frame include replacing and processing the door panel to complete the repair work.
In the repair techniques for car doors, the main method used is Master He Yubing's door panel repair method to address common body door panel damage, primarily using a single-action sander to complete the main door panel repair work. This door panel repair method requires that the damaged area of the car body door panel does not exceed 30% of the entire panel, and that the internal structure of the panel has not suffered substantial damage, ensuring that vehicle safety is still guaranteed. Thus, it can be seen that when there is relatively minor damage to the car body panels, applying the door panel repair method can yield better repair results.
In the specific repair process, it is essential to pay attention to fine-tuning treatment of body panels by checking flatness and uneven surfaces through sanding. The main role of the sander is to sand and operate on the area to be repaired; using a method of sanding while cooling can reduce deformation issues caused by sanding. Checking flatness involves using body file equipment to file out high points for flatness inspection; for repairing uneven surfaces, it is necessary to analyze whether there are high convex soft elastic conditions at the repair site and use a micro-shrinkage fire method for inspection.