From personnel experience soak them down with some type of rust
penetrate. Then get the biggest dam sledge you can get into the space
and beat the rotor first front side all around until you see some sign
of movement then give it at tap rear side. Note: Have new rotors on hand
they old ones will look worse for wear and tear. Coat the new rotor with
anti seize and with any luck they will come off easy next time. Major
pain I feel for you.