[700rpm]

First, take Brent’s advice on repros. Second, I would suggest that you remove the fender, then remove the bondo everywhere it exists. Then get a hammer and dolly kit from HF and read and teach yourself dolly work and how to shape the fender back to close to good such that the crack is aligned. Then find a welder who will listen to your problem and weld the crack to your specs. Don’t braze. As you get close to a proper shape, bolt the fender back on in its
proper position. This will help assure a good final fit, and also anchor the fender as you work on it. Once bolted on, proceed with hammer and dolly. It really isn’t hard to learn, and you’ll feel good doing it because you can watch the fender improve as you go along. Finally, when you think you’ve got it about as good as you can get it, consider finishing with bondo or a similar filler. They are easy to work with and better than than they used to be. Go slowly for a more harmonious outcome. If the fender is a lost cause right now, what have you got to lose by trying to fix it yourself? Let us know what happens.
~ R. Horton