I just replaced my rotors/pads/seals/bearings/caps a couple months ago. Just my luck, my caliper seized shortly after and warped my rotor. Can I just throw on some new calipers/rotors without having to do the seals/bearings again, or are they damaged in removing the old ones?
It would be best if you replaced at least the grease seal. As long as the rotor never seized up the bearings are most likely not damaged and can be re-used. It is possible that the grease seal is ok as swell but those are not intended to be reused once pulled off the spindle.