I usually do 1/2 of each panel excluding larger panels such as hoods, truck bed sides and roofs. Those larger panels I devide those into quarters. I follow these procedures same way with both rotary and PC. 2x2 or 3x3 is the idea measurement for polishing or waxing panels. Time consuming this way especially when using the PC but polishes aren't meant to go a whole panel such as 1/2 hood, a full door etc... Waxes are alittle different but I still treat them the same way as polishes. I just don't work them as long because there's not much if anything to work with in waxes. Smear them around the panel with PC, wait about 20 mins then wipe off. Hope this helps,,,,AR