mig welding

Get the gas, no splatter. Welding my top halo, 2" from the headliner. I just have to put a piece of tin foil between the tube and headliner. Flux core is nasty, and nasty to weld with. 75% argon, 25% co2; is a completely different world.
If you can get a semi-good weld with flux; using gas will make you a pro. Within 3 minutes, you just have to adjust the heat and wire speed.

It is a whole new world since I converted over to gas.