Cars sitting up for long periods of time are more likely to have rust in hard-to-reach places.
Rust paint stops or prevents rust. Rust paint comes in handy when repainting a rusty vehicle that cannot be cleaned of all existing rust. Rust paint can also be used in cracks or crevices of a car that can't be reached to thoroughly remove the rust. Rust paint breaks down existing rust and transforms it into a sandable surface, almost like a layer of primer. Before painting, the car's surface must be prepared for rust paint to work properly.
Instructions
1. Use a wire brush to brush away loose rust from the surface. A stiff wire brush can loosen and remove large chunks of rust and most small flakes. Move the wire brush back and forth over the rust until no more rust flakes off. This leaves the area much smoother than before.
2. Sand the rusted area with 80-grit sandpaper to remove the last of the loose rust on the surface. Sand the area as smooth as possible to leave a flat surface for the rust paint. Some visible rust will remain, depending on how much rust was there to begin with.
3. Blow the rust and dust off the area using an air hose or wash it off with water. Make sure to wear eye protection if using an air hose. If washing the area with water, let the surface dry for at least two hours before applying the rust paint.
