I found the buffing machine. The spindle is missing a grub screw and the other's hex drive has seen better days. I'm not sure what size they are - the thread is certainly courser than your average "M" bolt. Could someone identify them so I can order some new ones? Alternatively we could order a new spindle.
I was using T Cut as thats the general recommendation for these phones but it seemed a little inefficient, I suspect I could go slightly more abrasive. Does anyone recommend any cutting compounds for ABS plastic? I've seen white used. I don't need anything too abrasive or a mirror finish..