[Oldbluoval]

There are great YouTube videos on shrinking and other metal work. Wray Schelin’s are good and Wolfe’s. I also use a Stinger to shrink in specific spot; comes with special head. Just takes getting used to.
Agreed MIG welding is problematic but quick and easy. Very short learning curve; TIG is a longer learning curve.
Another great process is the use of slapping spoons on small “bag of walnuts” areas where prior “body men”, used loosely, have used a pick hammer to knock a dent out!