You can't damage the frame with sandpaper. Its very thick.

It depends on what you are going for. If you are doing a show truck, then strip to bare metal and use etching primer or have it powdercoated. If you just want to use something like POR15 or Zerorust, then all you have to do is clean the rust off the surface and paint it on with a brush.


Paint & Body Shop moderator
A lone amateur built the Ark. A large group of professionals built the Titanic.