Are you working by hand or my machine?
If you are doing everything by hand, well then talk to Scottwax. He seems to detail pretty fast, with all his customers. He can also read fast too... (heh

Scott)
If you are working by machine you should have no problem polishing in un under two hours. What kind of polish(es) are you using that you have to wait 6 hours for it to work? That dosent seem right to me, but theres a lot out there I havent tried.
I can do a SMR/Polish/Wax job on an oxidized older S-Class MB in about 3 hours by hand. I used Scratch X to start out, then went over that with a finer SMR, 3M SMR DC, then followed with IHG (hard to remove, but well worth it), then topped with
Souveran. Results were great too.
Definately, check out the polish you are using, 6 hours of waiting is too long.