[mongocanfly]

Dont try to weld a bead on thin metal..it will result in a mess...only do stich/spot welds..keep each spot about 2in apart, and move around as you go.. wait for it to cool before doing more..When doing stitch welding, you'll need to grind each spot as you go, be sure to grind only the metal you added with the welder..if you go to town with a grinder, you'll get into the orig metal before you know it..then itll be really thin..
I use the mp&c method..use a cutoff disc on a air grinder..keep disc 90deg to your weld seam and you can keep it on the high part of your weld....do a series of spot welds and then grind each weld flat...if possible use a hammer and dolley as you go on the ground spot welds...also anywhere you can get copper on the back side of the weld it will greatly help you prevent burmthru...