Care to elaborate on your process? I couldn't locate that polisher for the price you got it for on Amazon.
I got it "used" on Amazon, it was just open box condition. I don't think it was ever used. I'm sure another one will pop up soon.
For my process, just look up some of Larry Kosillas videos on youtube. Without getting too much into detail.. Clay before you polish if you need it. For polishing, start with the roof in 4 sections, then hood in 4 sections as well, ect.. Use a snake motion up and down then left to right. Start on speed 2 then go up to 5 or 6, end on 3. I seal right after I finish a panel, seems to save time. Takes about 3 minutes a section. Remember to fully work the product in.