MIG is great. BUT, if your doing it outside with any kind of breeze it is a bit--!!! You can use co2 or a 25% mix (argon) which is better I am told. I only have used co2 which works fine for me. If welding outside in a breeze a flux wire would be best.
Yote
I would be welding outside. Going to mig whenever possible. I haven't welded on thin metal with flux, I've heard it is easier to burn through thinner metals with flux. But I'm sure I'll have to do it.