Just did that myself couple weeks ago. About the same mileage and two years since new Stazi frt brake job.
I used a 6" orbital right angle sander with 80 grit, I suggest 60 grit it be easier and faster.
I removed the 1/16" ridges, minor ridges (pad contact area) & also small surface erosions (not a machinists term??)caused from winter salt.
I even touch-up pads and I still haven't yet found the caliper pin bushing so those didn't get replaced. Surprise the brake smooth as silk no more weird shutter.
Of course everything got cleaned with good CRC cleaner and lube as doing a new job.
I do like these Bendix pads not to mention the good quality rotors. Having a good casting allowed the machining/cleaning to provide like new surface again.
I'm guessing .001"-.002" of the pad contact rotor surface was removed.
I also finally found a few weeks later Castrol LMA and a Might VAC and did full flush, also providing even better pedal feel.
Guess now I'll be more inclined to flush yearly now.
Ah what a good feeling when maintenance turns out so good the first try! I saved money and hours of furstation aruging with a shop!
Paul
It's becoming more difficult finding 6" sanding discs?