Does your welder have the capability to add gas or is it strictly flux core?
I've used a 110V Lincoln Handy-MIG for all my sheet metal welding. It has 4 power levels and variable wire speed control. I usually run it on level 3 or 4. If your machine can accommodate a gas cylinder, then it should work for you.
Check out the sticky thread at the top of this Paint and Body forum for some great tips on welding sheet metal.
