I got into an accident a while ago and replaced my bumper w/ a fiberglass kit etc... [save rice comments please]. Either way, the shop that fit it sort of... glued it on with this black "gunk" stuff (I guess it didnt fit very well). Well I need to remove it now to replace my headlights (they're all old and leaky etc). How do I remove it? Heat gun? Will that melt it enough to remove the bumper? Will it damage the paint? Thanks...