Weld and grind...

... and weld and grind and weld and grind and so on. Sometimes you wish you'd never started as you flake off perfectly good paint to reveal fresh air. Even on the lowest setting the welder is like a plasma cutter blowing holes straight through the wafer thin metal. It's a very good lesson, for a fella who is more used to clagging stuff using a stick welder, in how to weld thin steel with a MIG and i'm slowly getting the hang of it. That is a good thing because there is plenty of welding to do. By the end of it I should be able to stitch tin-foil together.