I'm with EP, the Hi-Temp cutting line has completely taken PG out of my lineup. I find that the HT products cut faster, and with NO dusting or slinging, cuts my after-buffing cleanup time in half. It does gum up sometimes, but if you mix EC with OHC, you get a real winner. OHC just doesn't cut quite enough for those truly terrible jobs, but its nice for medium swirling (just a lil bit more than
Menzerna IP could handle).
I still like Menzerna alot better than Optimum for finishing though. PO85RD or FPII are just that much finer than OCP.