You may need to put some heat to them while using a press, with light pressure, it shouldn't take too much. Also soak them in penetrating fluid.
If you explain that your trying to turn the rotors to keep the car original "for shows" you may get someone to turn them. Like Mike said, most shops don't want to expose themselves to the liability. Really, if your thinking about using them on a driver, I wouldn't turn them below mins, just replace them, not worth the risk of failure and possible liability, God forbid, you injured someone due to bad rotors.