i recently had 2 cars in the shop that both needed shaved handles. i have seen someone that didn't know what they were doing do it before and nearly ruined the door. it was caved very bad from the heat (i assume). anyway, i had a buddy of mine come over to mig weld both cars. he knows he had to keep it cool so he went slow only tacking a couple spots at a time until it was welded all the way around. the damn door still dented in. not real bad but bad enough. about a 8x8" area which i was able to work back out. the second car he did the same thing but only tacked it every 3/4" or so. wouldn't you know it, the damn door still dented in. he would only do 2 tacks at a time then cool it right away with the air compressor. is there some kind of secret here or something i am missing?? whats the trick??