Rust is never a good thing to see on your car paint. You can't just paint over it; you need to remove all rust from the area and strip that spot to bare metal first, or else the rust will come back. There are multiple ways to remove rust from your car's paint job. The best method for you will depend on how bad the rust is on your car.
Instructions
1. Run a rust removing pen over the very small spots. This "pen" is a tool with fiberglass strands that pick away at the rust as you twist the pen against the surface.
2. Switch to sandpaper for slightly larger spots. You might need two types of sandpaper: Start by rubbing coarse paper against the rust to knock the larger spots loose, then rub fine paper against it to help sweep away all loosened and remaining rust.
3. Use a power grinder with a sanding wheel for large spots of rust, rubbing the grinder against the surface. A metal grinding wheel may be needed for excessive rust, but be careful with it because it can damage the metal. In any case, you will likely remove paint with the rust.
4. Cut away and replace the metal only as a last resort. You'll need to use the grinder as a cutting tool to cut away the metal, then use a welding torch to connect new 18- to 22-gauge metal in its place. This should not be attempted unless you are an expert at cutting and welding metal.
