How to Repair Rusted Bottom of Car Door?
2 Answers
About the repair of rusted bottom of car door is introduced as follows:1. Rust appears on the surface and the area is not large: Use water sandpaper to grind off the rust, then spray anti-rust paint. 2. The car door is severely rusted with large areas of paint peeling off: Clean off the rusted paint completely, then fill and level it with putty. Tips to prevent car doors from rusting: 1. Be alert to small scratches in subtle areas: Rust often appears on the surface of the car paint. In addition to common collisions and scratches, small stones kicked up by tires hitting the paint surface while driving can also cause small peeling spots on the paint, which will develop into small rust spots over time. These small scratches are mostly in inconspicuous places and are easily overlooked. Therefore, it is necessary to regularly inspect the car body, engine hood, and around the vehicle, and deal with any issues promptly once they are found. 2. Frequently check the humidity in areas prone to water accumulation: It is inevitable for vehicles to encounter rainy or snowy weather or pass through muddy and waterlogged roads while driving. Sludge can easily accumulate in some gaps at the bottom of the vehicle and on the floor inside the car. If the owner does not clean it in time, moisture can hide there. Therefore, it is necessary to regularly check areas such as the inner and outer edges of the wheel hubs, car doors, bottom corners of the trunk, keyholes of the doors, and moving parts of the wiper arms. At the same time, keep the drainage holes of the doors and various parts of the car body clear, and check the humidity of the interior coverings, such as carpets, to prevent rusting of the floor components.
Just helped my neighbor deal with rusted-through car doors a couple of days ago. If the rusted area is small, you can DIY: First, wear goggles and a mask, then sand off all the rust with sandpaper to expose clean metal. Cut a piece of wire mesh slightly larger than the hole and use fiberglass resin to attach it to the back as a framework, then apply putty twice on the surface. Once dry, sand it smooth and spray paint. Avoid working on rainy days, and cover the surrounding area with newspaper before painting. However, if you see cracks along the door frame edges or rust that crumbles at a touch, don’t attempt to patch it—send it to a repair shop for cutting and welding immediately, as DIY fixes can lead to leaks. Finally, remember to regularly check the door drainage holes, as aging rubber seals can also trap water and cause rust.
