Let say a guy wanted to lose the gas door on a his 55 sedan. I would think he would cut out a secton big enough to remove the complete opening then butt weld a section from a donor 56. I was told to lap weld it last weekend by a fellow car guy. It seems any lap joint, especially on the inside of a fender would lend itself moisture inbetween the joint. "Am I right or am I right?"