I have a PC7424XP with lake county pads and I use Poorboys World Products.
This session this weekend was 4-5 passes of Professional Polish, then EX-P, then Black Hole and 3 layers of Meqiuars Yellow #26.
This is my thoughts on detailing, I have never had luck with the walmart/auto store compounds and such. So yes I spent some good money, but the results are soooo worth it in my eyes. So in essence, if your going to do it...might as well do it right

Also, being able to do this on my own to cars in the family is worth ever penny. I haven't made any money off the PC, don't know if I ever will. But for personal use even, it is worth it. Makes waxing a breeze. I put wax on the whole car and get all the way around and back to the start and its just now ready to wipe off. Saves your arms/elbows for sure.
It has taken me A LOT of learning to get where I am. I asked a bunch of questions and still don't know what the heck I'm doing. But just like this forum, there are forums for detailing out there, and those guys are nuts! They have helped me beyond what I thought was possible.
It is an addiction tho, once you get started...its a never ending dark and bottomless pit. Kinda like the mod bug.
I can no longer look at a cars finish the same now. I see swirls and hours of endless polishing.