How many times can a flywheel be re surfaced?

Since the pressure plate bolts are have a larger shank diameter than thread diameter to locate the pressure plate, it would be possible to bottom out the shank before the pressure plate bolt is tight against the pressure plate if the flywheel was cut too much. This could be corrected by putting a flat washer under the lock washer or drilling the shank part of the flywheel pressure plate hole deeper but if you run into this problem then you probably cut the flywheel one too many times.