I have heard many times about using a piece of copper to put behind a hole when MIG welding so the weld doesn\’t stick to it.
I just it was a pride thing “Hey, I don\’t need any crutch to weld up a hole”
Anyway, I had a hole that was rather large on the edge of a panel. I looked at a piece of scrape copper tubing on the floor and said, “what the heck”. I smashed the tubing flat and used it. It works like frigging MAGIC! You can weld a hole an inch across! It is really neat, if you havn\’t tried it, do so.
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