I haven't used gas yet, just flux core wire. Does the gas make that much difference?
Flux core is not for thin sheet metal, much too violent. Flux core works great on thicker metals, especially if their a little dirty. Gas creates a shield around the outer area of the weld, but flux core shields from within, driving out impurities... hence all the splatter. Gas is a much better way to go with sheet metal, but if you’re welding a couple of old rusty angle irons together, break out the flux core.
