Getting started

So I finally got started on the tear down on the Valiant. Started with the interior. Got the seats, carpet, and door panels out. No floor rust except for where the A/C would leak into the passenger floor board and that appears to be on the surface. Metal is strong. With that said, what is the best way to get rid of it. I need to get a sander for the body work but I am not sure what to get. Suggestions? Pics will come later.
And BTW, the vinyl top is soooooo gone.