VB242
I.M. Weasel
- Joined
- Sep 21, 2011
- Location
- Driving the No Malarkey Bus
I was going to say #2500 as a last cut before polish but it's not a common grit.
3m makes 2 micron/7500 grit diamond polishing pads, Abrasive Technology makes 8500 grit pads. 14,400 is generally optical quality but that's in a paste. . The 3M rep had a sheet of 50,000 grit one time, which I promptly ruined by rubbing it on a granite counter top. He said they use it for making semi conductors.