I need my front brake rotors turned or replaced on my 2011 VW Jetta. I've got them off the car, and I was thinking there would be a marking on them to indicate a brand or a minimum thickness, but there doesn't seem to be anything but manufacturing information stamped on it. The lettering is lightly dot-matrix punched into the middle of the rotor and the only word I can make out is "Mexico." The car is new to me and I don't have any maintenance records that would show what kind of rotors these are.
The rotor surfaces are clean and in good condition, but I think the rotors are warped since the brakes "pulse" when I brake.
Is there a way to tell if these can be turned?