you can cold shrink it to . you can turn you door to junk by heating it up. if you do not know what you are doing ?i do not think you should do it with heat . if you do find a junk door and try your skills at it before you work on your good door. to cold shrink or kink it you need a good body hammer with a pick on it you can use a dolly with some rubber on it like a old sanding block use the dolly as a back up inside the door and then use the pick hammer to kink the steel try to go around the hi spot with very light hit DOT NOT BEAT ON IT JUST PEPPER IT work on it till the oil can is not there this will pull up the steel