How to deal with rusted-through car door panels?

[LeClayton]

If the metal sheet of a car door panel is rusted through, the rusted part needs to be cut out and re-welded; if the damaged area is large, repair is not recommended, and it is better to replace the entire panel. More information about car rust is as follows: 1. If the rust appears on the surface and the area is small, you can use water sandpaper to grind off the rust and then spray a layer of anti-rust paint; if the rust area is small, scrape off the rust, clean it with sandpaper, and then perform touch-up painting. 2. If the car door is severely rusted and there is a large area of paint peeling, the rust and paint on the door need to be completely scraped off, then filled and leveled with putty. After the putty hardens, repainting can be done. Car rust should be dealt with promptly, and preventive measures should be taken. Most rust is caused by rainwater corrosion, and there are drainage holes at the lower edge of the door. If these holes are blocked, water can accumulate, making rust more likely. Therefore, it is important to clean the car body promptly after rain, and any scratches or damage on the car surface should be repaired in time to avoid oxidation and rust.