How to Repair a Rusted-Through Car Door?

[Warren]

When the metal sheet of a car is rusted through, the rusted part needs to be cut out and re-welded. Methods for repairing a rusted car door include: 1. If the rust appears on the surface and the area is small, sandpaper can be used to grind off the rust, followed by spraying a layer of anti-rust paint; 2. For small rust areas, scrape off the rust, sand with sandpaper, and then perform touch-up painting; 3. If the car door is severely rusted with large areas of paint peeling off, the rusted paint must be completely removed, followed by filling and leveling with putty, and then repainting. If the damaged area is large, repair is not recommended, and it is better to replace the entire piece. Car rust should be treated promptly, and preventive measures should be taken. Clean the car body promptly after rain, and repair any scratches or damages on the car surface immediately to avoid oxidation and rust.