I miss the snow...
No need for a TIG - unless you've been looking for a reason to get one. Set your MIG on the lowest setting, use thinner wire such as .023 if you can, and do a series of tacks. That method works fine on sheet metal.I'll definitely be breaking the ice with the drivers side fender for sure. I've got a rust hole in the inner fender where the washer fluid bottle and engine control module sits as well. That's thinner metal than the outer fender so I guess I need to get a tig welder if I want to do it myself. I don't think my mig welder will do the thinner inner fender well without blowing though. Even on the lowest recommended setting. As for now I'm closely reading Adam's 1979 CJ5 resto because he repaired the same areas of his fenders