I have spent the past two hours trying to get one 17mm bolt off so I can remove the caliper bracket. I have heated it up for god knows how long. banged away at it with a hammer and tried to use the biggest breaker bar I can fit in the wheel well. My car is now on jackstands and I am going to waste the rest of my day rounding off a bolt
EDIT: SUCCESS!!!! I don't know if it was the wax trick or finding a make-shift breaker bar that fit perfectly in the wheel well, but I got it out. Something is wrong with it though because I got the caliper bracket off fine but the bolt doesn't seem to want to come out of the rear housing whatever it is called. Enough to change the rotors though!