How to Repair Rusted-Through Car Doors?

[SanNoah]

Solutions for rusted car doors are as follows: 1. If rust appears along the lower edge of the door, it should be addressed promptly to prevent the rust from spreading and eventually causing the car's metal sheet to rust through. 2. If the rust is superficial and covers a small area, you can use wet sandpaper to grind off the rust and then apply a layer of rust-proof paint. For minor rust spots, scrape off the rust, clean the area with sandpaper, and then proceed with touch-up painting. 3. If the door is severely rusted with large areas of paint peeling, the rusted paint must be completely removed, followed by filling and smoothing with putty. Once the putty hardens, repainting is necessary. 4. If the car's metal sheet has rusted through, the rusted portion must be cut out and re-welded. If the damage is extensive, repair is not recommended, and replacing the entire panel is advised instead. 5. Car rust should be dealt with promptly, and preventive measures should be taken. After rain, clean the car body immediately. Any scratches or damage on the car's surface should be repaired promptly to prevent oxidation and rust.