MPandC is correct about using flanging and the possible water/rust issues. What I have done with good results, is seal the inside surface of a flanged panel (after welding,) with fiberglass resin. It is thin enough to go where gravity takes it. Of course, metal must be shiny clean. Should last longer than most of us!


1940 Chevy 1/2 ton pickup "KC"
A day without sunshine is like, well, ..... dark!