How To Weld Sheet Metal Holes. Beside above can you drill and tap a MIG weld. Before you begin the process of welding a very thin sheet there are a few things you must have.
Ensure that the sheet metal extends over the metal panel by at least two inches past the damaged spots edges. The real trick to weld sheet metal is to use a wire feed. Cut out a bunch of little square pieces tack them on the back side fill the top up with filler metalits going to get hot and shrink of course.
Allow the epoxy to cure.
Grind off the backs and bump out the shrinkage. Spot blast the back side of your welded holes the side you had the copper backing on or hit em with a wire wheel to get clean steel chamfer the holes youre filling with your roloc sanding disc epoxy prime DONT por15you cant go over it with anything unless you use their tie coat. Plug Welding Holes in Sheet Metal with Magnetic Copper Backers - Mike Finnegan at Hot Rod - Eastwood - YouTube. By comparison high temp soldering brazing is guaranteed to warp and buckle the metal.