[john walker's workshop]

the body shop stud welder loads what looks like a nail with a rounded head. you position the head against the spot you want it to adhere to, pull the trigger for 2 or 3 seconds, the nail (stud) gets red hot and welds itself to the object. then you loosen the chuck and remove the welder tool. then you attach the related small slide hammer after it cools to touch, and carefully tap it out, hopefully. probably can rent one at rental places. the pin is real hard, so hopefully the stud will stick sufficiently. it's a tough issue to deal with, even professionally, so go slow and don't get crazy.