Re: Patching a gas tank
Joe, I would try a 100w soldering iron, some flux and 50/50 solder. Just clean the area real good with sandpaper and maybe some steel wool first. I have patched many pin holes that way over the years. You can sand the solder a bit to blend it in. If it's something that'll show just dimple the area, fill it with solder then sand it level with the tank. It'll work.
Good luck, Dan