I've been using Powergloss pretty reguarly for about a year now. Here's how I do it...
-Work in no larger than a 2'x2' area. For hoods, I will work 2' wide, and the length of the hood if its nothing like a Tahoe or something of the sort.
-Apply a bead of polish to 60-70% of the length of the area (make the bead line in the middle).
-Go over the area slowly with the polisher barely on, just to get the polish worked into the pad (saturated) as well as evenly on the surface).
-Crank her up to 1500 rpm on the cutting pad and work the PG SLOWLY (3-5 seconds per foot). 1500 is absolutely optimal. I tried 1700 (too fast and the product just mars) and 1200 (too slow, the product needs multiple applications). 1500 is where you want it.
-Use overlapping passes using the pressure of the machine, then go back to the original starting place and go polish again (same bead of polish, just breaking it down further), and polish as before using almost no pressure whatsoever (use your hand to guide the buffer, don't even press down). Work the areas slow and overlapping.
-Remove the product. Some areas will need a spritz or two of QD.
Powergloss is the only compound I've found to successfully remove MOST defects the first time with only very MINOR hazing/hologramming left. I am able to hit it afterwards with Optimum and the finishing pad @ 1200 or Menzerna FPII on the polishing pad @ 1500 and be done with it. Most every other compound will require a step before that.
For rough areas, 2-3 applications will be required.
Hope this helps.