I was always taught that brake rotors should be turned every time the pads are changed, but much of that teaching came from working at a regional chain auto parts store which offered that service as well as my dad--and usually when I helped him the rotors were in obvious need of resurfacing due to grooves, etc.
The rotors on my truck look great though the pads are getting close to their lower limits after 56K miles. Is there any real advantage to pulling them off for turning? Or should I just install new pads and go? Obviously the latter cuts several hours off the job pulling them, taking them in, waiting, etc.