DirtFarmer wrote:
As long as you exclude oxygen by flooding your weld location with pure Argon. (Argon+CO2 is used for some welds depending on the material being welded).
And it is possible to make highly unprofessional looking welds with a MIG welder (from personal experience).
I rate a weld successful if it sticks together. The appearance can be adjusted with a grinder and some manual dexterity.
Been there done that.