I would like to clean up and undercoat my trucks frame with a bed liner or a ruberized undercoating. My trucks frame is pretty rusty all around so im wondering what would be the best way to clean it up and undercoat it with. Keep in mind that ill be doing this with the body and everything still bolted on. Should I use a wirewheel to clean up the rust that I can reach and possably a rust reformer to spray on the parts of the frame I can't reach to sand? Thanks for your time and help all!