quote:Originally posted by DeTom:
So Gary does this mean you would recommend NOT to use a torch to do all the welding with? Even if you go real slow?
Detom I must have written over my other post. Absolutely not for the torch. A TIG is basically a mini torch and the heat saturation required to weld creates warping problems for open sheet metal immediately.
Torch welding is an art not easily picked up in a short period of time. By contrast torch welding is preferred if you work a piece of metal in an English wheel after you weld it. A torch spreads the heat into the metal and you will have less cracks but if you are working the metal in an english wheel anyway the warping is of less issue.
Suffice to say when MIG'g properly there is NO WARPAGE of the metal.
Also, if you overlap the flairs spray zinc or weldable primer between the sheets for corrosion protection but you still need to clean the metal where welding. You can weld directly to weld through primer but it works a lot better if you weld to clean metal especially for thin metal.