I had a heck of a time getting one rotor off the car. The drivers side I had to heat it up and bang it with a sledge hammer. It looks like they were original rotors. I hope the back ones are not as hard to remove as the front.

 

Damn, when I changed mine they fell off after I got the Allen head screws out, I thought the screws would be a problem but they came out fairly easy.
Changed lower ball joints Saturday and passenger side I was ready to break out the torch, took forever getting it to break loose with a big hammer.