My suggestion to you would be to slow down and get a lot more practice. You can buy all the products in the world and throw at this, but until you become proficient in the use of the PC, none of it is going to help. And jumping right up there to a compound on a PC is probably only going to make things worse - by instilling deeper hazing you won't be able to remove. I don't know exactly what it is you are not doing, as I have tried to somewhat follow your posts, but I will tell you this - SSR2.5 is a pretty aggressive polish for PC use, and there's not a whole lot I couldn't get out with it using just a PC and some patience.
My guess is, you are not spending enough time on the marring for the PC to effectively work down the edges to reduce/remove it. I think you should stop where you are, take a day or so and work on one panel - half and half to measure your progress. Take pictures and post them up, both of the panel and, if possible, how you are using the machine. Post those up and let the guys on here critique what you are doing.
Sometimes with a PC, you have to move very slowly and be very patient. Don't expect to be able to polish your car in one afternoon and have it 100%. In reality, you most likely won't ever get it to 100% if you drive it daily. You seem to be very new at this (PC polishing), so I think you need to take more time to research your exact issue and possibly search out someone close to you who may be on DC, Autopia, etc to give you a few pointers. Maybe you could meet up with someone and buy their lunch or something for a couple hours of their time.
Throwing money (i.e. different products) at the problem is not going to make it better. You're gonna have to get familiar with the PC, the different pads and polishes, and understand what you can feasibly remove and what defects you'll have to live with.
