Can a flux core, gasless MIG welder be used for auto body work? Using a Chicago Electric Flux 125 MIG welder from Harbor ...

Flux-cored arc welding (FCAW) Similar to MIG, except there's no separate shielding gas because the wire electrode has flux in its core, which creates its own shield as the wire melts.

And the welding couldn't be simpler: Flux-cored arc welding with a low amperage setting and a slow wire speed is about as easy and forgiving a process as you can learn.