I suspect the ospho will not make a good, if any electrical connection. In a couple of places on my rusty 38 cab where I did a few plug welds with the mig I used some weld through primer which seemed to work ok, and in theory has sealed the surfaces in between. Just $.02 from a jack of all trades master of non type.


38 Chevy 1/2 ton being resto-moded
65 AC Cobra replica
USAF vet