Originally Posted by
Mike Switzer
Just to add my 2 cents - it is very easy to make a mig weld that looks good on the surface but does not have good penetration. If you are buying something done by someone else I would have it inspected by someone who is experienced in inspecting mig welds. (most fabricating shops have a weld inspector).
I have a mig, and I have gas welding equipment. I will be using gas on my fuselage. I find it is much easier to make a good weld with gas if you are not welding frequently enough to stay in practice.