When filling thick sheet metal like that i let the copper plug stay a little proud on the show side and dressed it down the back side i filled with polyester filler bondo and as it deserves repeating i can not over emphasize the importance of cleaning the sheet metal thoroughly before soldering.
Filling holes in sheet metal.
If you know how to weld take advantage of your tools for a longer lasting repair.
Whether you re dealing with a small piece of sheet metal or something valuable like a car you can fix it.
By filling in holes you stop rust in its tracks and ensure the metal lasts longer.
Body filler is a simple way to repair freshly cleaned holes.
Works on metal wood and concrete.
Easy to use filler can be drilled filed sanded and painted.
Perhaps a simple rivet or sheet metal screw can be secured in the hole.
Fills small holes cracks and perforations.
Excellent adhesion to galvanized metal.
The kind of plug to use depends on how the thin metal is being used.
Holes in thin metal can be filled with plugs.