Well first off whoever told you to use a heat gun on your car is a dumbass (see, this explains why you hardly ever listen to people on the internet) But anyways, when my lug nut was stripped to the point that it looked like a round nut with no edges the tire shop got a slightly smaller socket and hammered it on- creating new grips for the socket. You might want to try this, because burning it off will ruin the stud and it will be very expensive to fix it after that happens. If that doesnt work you might want to try what phat99accord said, because i was going to use that nut cracker, but it just didnt fit in the valley's around my lug nuts but it should fit on the nuts that hold your strut bar down with no problem.