Had one of those spot welded case motors on my ceiling vent fan in my RV that needed brushes. Found a compatible set and ground off the welds and replaced them and rewelded the case with my TIG. Easier to control weld heat and do localized welding without destroying the part.
One of my favorite things to do when I'm bored is butt weld two aluminum coke cans together. Good practice for thin gauge welding and proper feeding of filler rod too.
Back in the 80’s, I did business at KC Aviation in Dallas and I visited the machine shop one day to find two welders arguing over who was more talented. One of them had welded a 1/16” piece of flat aluminum to a thick, cast-aluminum axle housing and was bragging about it.
Next day, the other welder welded a piece of aluminum foil to the other side of the casting and handed it back to the first guy.
First welder then stripped the wax-paper off a chewing-gum wrapper and butt welded it to the aluminum foil, and was showing it to the second guy .... when the Director of Operations, Mr. Connell walked up behind, surprising them and looked over the parts.
He demanded of them if they’d done that on “shop time using shop equipment”...and they fearfully had to say “Yes”.
“Well’, Connell said, “ you now get $2 more an hour.... I can’t afford to lose talent like that. Get back to work!”
I don’t think I’ve ever witnessed two guys more scared so quickly relieved then so quickly happy!