I wasn't going to respond to this thread, but because it involves such a great product, I couldn't resist.
3M's Perfect It III MG is one of the BEST overall polishes I've ever used. Great for light swirling, perfect for stepping down after Fine Cut to get rid of hazing. I have found that moistening the pad a good deal (even perhaps running it under the faucet, then wringing it out), allows you to work the polish nicely and makes your pad a bit more flexible. I normally use MG with a white polishing pad.
Here's a tip: apply @ 3 OPM, then kick it to 6 OPM and get to work. The polish will flash almost immediately but with the moist pad will not dry up completely before you've completed that area of your car. It will start dissapearing some as your pad picks it up, this is a good time to stop working this area. On your final pass, apply ZERO pressure to the pad in order to pick up as much product as possible. This will help in what you have to buff off with a MF.