Lots of threads related to this subject. I would say the consensus is to carry on with what you are doing, except perhaps you can try the heat step. Heat the disk up for 10 - 15 minutes with your propane torch.

When you use the PB Blaster make sure you try to get it in behind the rotor, thru the lug bolt holes, etc. Otherwise, use the biggest BFH you have and hit the rotor, rotate the rotor 180 degrees and hit it in the same spot. It will come loose sooner or later.

Rgds,
Chris W.
put a little anti-seize on the mating surface of the new set when you install them