Join Date: May 2010
Location: Port Orange, FL
No just putting paint over the rust wont help. Gotta get rid of the rust first. There is a good chance it is rusting from the inside. I agree that sandblasting would be better than grinding, but most guys dont have access to a blaster. If you can get rid of most of the rust, get it treated, and covered with epoxy, there is a good chance of success.
Personally I have had 100% success with stripping, treat with picklex, then if you cant see it when finished I use rust bullet, and if you can, I epoxy and paint. But like was said, if the rust is really bad it must be cut out and replaced.