I'm planning on welding in a small patch panel on the roof of my old car. I went down to the metal supplier today, and I asked for 1018 cold rolled. I took the drop piece they sold me which has some light surface rust on it home, (holy hell steel has gone up since I last bought some, $20 bucks for a 2x2 piece...). When I got back, I was able to see it is actually a piece of 18ga (40 thou) 4130.. Patch piece is about 3.5 x 3 inches so not very big, but the cut out piece had a lot of pitting so I opted to cut and weld rather than fiberglass over it.
With that said, this is a non structural weld just a patch panel.
Was planning on running er70s2 either .035 or .045 wire. Any reason I should not weld this up like its mild steel and move on to body filler and paint?
Thanks!
