How well will a flux core wire fed non mig welder work on bodywork? I have a co-worker that has offered to give me an old no name non mig welder. I know, it's not costing me but is it the "right tool" for the job? I don't plan on welding anything big, just bodywork and my yet to purchased exhaust so that's not an issue. I understand that I can weld stainless with a mig welder.