1974 Dart Swinger VS. The Evils Of Rust!

Use the thinnest wire your machine will handle with gas.
I keep .030 in my mig, so I can weld sheet-metal or heavier steel.

And as far as rods, I put the floor pan patches in my Duster using an old Lincoln AC arc welder with the thinnest 6013 rods I could find, it will work, but a pain in the axx. My mig welder was broke when I done that. I do not recommend a novice welder to even try to do that.