Some jerk backed into my daily beater with a rolloff or tow truck or something. I'm not looking for perfect, I just want to bang it back out so it looks normal-ish. The problem is that the thin inner layer of metal that the wiring clips onto is in the way. Since I probably need to wail on it with a hammer to undo that crease, what tool would be best to cut out a section of that inner portion so that it doesn't cover the dent from the outer portion of the trunk?