Floor Pan Question

Now I see what you mean. I agree with halfaed, cut out all the rusted metal and form a replacement piece from some good sheet metal. Also, I'd try and sandblast that inner metal floor bottom and use either a good Epoxy primer or some sort of Rustoleum or other rust inhibiting paint on it prior to welding in the new outer metal. Oh, I looked back at your original post and you say there is no rust on the interior paned, so maybe just hit it with some more paint to keep it that way. Don't bother to sandblast it if the original paint is still in good shape. Isn't it great what our Canadian winters do to these vehicles? :) Good luck.