quarter pannel install questions

Easiest way to control warpage when doing sheetmetal, butt weld or otherwise, is to use T.I.G., but that also requires someone talented with T.I.G. to acomplish it. My instructor when I went to school for welding technoligies told us that the person who can butt weld two pieces of aluminum foil together with no filler metal used in the T.I.G. process, can do anything and ask any wage. I also like T.I.G. because you can do it with a nice heavy T shirt and some good SPF 45 sunblock on. No spatter, woohoo!.