If welding a piece of metal what should the mig be on

I believe the results have a lot to do with the product used. I would use EuroSpray Weld Thru Primer Copper on my build, it was what the local automotive paint store had. On test pieces I did not scratch through the primer and welded normally with good results. On the car, I had some spitting and spattering on the beginning of new plug welds. I tried scratching through the primer thinking it would allow a better arc to strike, but it was no better. I think it had to do more with 50 year old metal being involved.

Another builder here, 7T02S, used Cobre Weld Thru Primer with good success. I believe he welded through the primer. Based upon his and my limited experience, buy the best weld thru primer you can get.

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i am not 100% sure but i think it is a.)

dont take my word for it

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