Originally Posted by DamonB

All of the rotors have an extra threaded hole in the hat (the area where the wheel studs poke through). You thread a bolt into this unused hole and it pushes the rotor right off for you. No banging required!!!

To prevent sticking of the rotor to the spindle in the future just smear some anti-seize or a good high temp grease on the spindle before remounting the rotor.