I have a video that shows a body man removing a bead roll in a panel with a tourch and a hammer and dolly. You couldn't even tell it was there. One of the problems with heat, is it will cause the area to shrink. It's very hard to tell without looking at your car to tell what is the best route to take. I have never tried to take a crease out of a panel but, I don't believe heat will make the crease stronger. As far a using heat on a dent, the metal in a dent is stretched, and to get the panel straight agian will require a little heat and a wet rag to shrink the metal back into general shape. Then you can use a hammer and dolly to finish the job.

Keith...