Nice slow passes are the way to go, and you will get a feel after awhile for how the polish is breaking down, and you will get a good feel for what gets results. I didn't start getting solid results with my PC until I learned to bump the speed up to 6 and apply firm pressure. Try the Sonus SFX-2 with a polishing pad (white sonus SFX pad or green das pad) with good pressure and nice slow passes. Work the polish until it is broken down. It should finish very nicely.
I never used to understand why people would remove their PC handle, but I don't use it anymore either. I hold the base of the PC (the part closest to you) with my left hand, and hold the top with my right, applying steady pressure with my palm. I find this is very effective.
You have the right tools and attitude for the job, you'll get it figured out, don't sweat it! And nothing but MF towels for your car from now on!! Good luck!
