So many variables at work it can take anywhere from 8-20 or more hours for me to correct a car.
The severity of the swirls, the technique you use, the ambient temps, the humidity (both have impact on how the product performs) and your overall efficiency.
I've done a lot of '6 sigma' on my process (something I learned in a former life as a distribution center manager) where I worked on reducing how many times I'd have to get up and walk to a cabinet, or look for supplies, etc.
Basically making the process EFFICIENT b/c at one point I did this stuff for money and the faster I could turn a car over the more profitable it became.
Also keep in mind the more you do it generally the faster you get.... most people take days to get perfect their first time out, but after a few times thru you'll find you're much faster than you were originally.
Also, I agree... WHERES THE PICS?!?!?!