Stop in for a cup of coffee

I may try it. It may just work better and flatter. Probably take longer but I’m okay with that
Practice!
It's easy to put too much heat in...
Tomassini 's technique is interesting.
Some older body books describe hammer welding with a second person (or acting very fast) using a hammer and dolly while its hot. Tommassini's method seems better if you have the time. I haven't tried it. Almost all of the patch welds I've done are in locations with no easy way to hold a normal dolley in the back while hammering.

If you can MIG with less heat, then it should cause less distortion. I only have OA.