I wouldn't know where to start to re-align that door trailing edge - the whole thing is quite a deep box section, isn't it? I'd be very interested to see how you do it. Also, I am shite at welding thin stuff, even though I use MIG. The only way I have had any success, is to keep the current high-ish (or I just get bird-shit) and try to lay down a load of spots which join up with each other. Any attempt at a normal run of weld, and I end up chasing holes. So any comments on that would be welcome too. (My current car, an '05, is so thin I may try using methacrylate glue to stick patches on when the time comes, and lots of underseal! We use this (expensive) glue at work - it's amazing stuff).