I have the Campfield Housend MIG welder, flux core. It does an excellent job on sheet metal, but it does splatter a LOT. If you really want a CLEAN weld, TIG is the way to go. But, a MIG with gas shield is certainly cleaner than a flux core. But the flux core is very economical, and it will weld up to 1/8" if you really burn it in hot.