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If you do one little spot at a time and wait until it cools completely, and jump around you should be okay.
Adam



I do that. I think I'm running ~30amps, and after tacking everything, I do ~1/4" stitches. Then I cool the spot with compressed air or a wet rag (tried both). I also move around to opposite sides of the patch. Still warps, and it warps BAD. I'me beginning to think that the warping has more to do with the nature of the stresses in the bead than it does with the heating of the surrounding material. When I went to a 1/4" stitch (down from a 1/2" stitch), I noticed that I could pretty much touch any part of the patch with my bare hands, and if that ain't cool enough, I don't know what is.

I've noticed that I can do succesful TIG welds on small, heavily curved portions of sheetmetal, like doorjams, but any open, flat metal like a quarter panel... forget it. It's gonna be heavy bondo time...