In my opinion don't turn them, just buy new ones. If they are warped they will likely warp again. If they are scored, don't let it happen again by replacing your pads before they're worn out. Routine turning when replacing pads isn't necessary with these rotors, just take the glaze off with sandpaper. Midas' price is cheap, I've seen up to $250 for on the rig turning. Why pay even $99 when you can buy new 4wd rotors for $60/ea or 2wd for $100/ea?