As I'm a Sheet metal worker by trade ...........
The above explains the casual way in which you describe cutting bits out, making new panels tacking them in place, seam welding them in, grinding off the surplus, a little filler and then spray to finish it all of ....... and that's without the off-hand reference to the fact that much of it has been done in stainless steel ....!!!!!!
Irrespective of your occupation, that is a truly great restoration that you have underway there and you are to be congratulated!! Please keep going with the story and the photographs.
Andy