I use an dpolish my installs out with FPII and then use OCW to maintain.
As for the new 3M film......it's much improved. It goes on much nicer and just gives you a cleaner look afterward.
If you are trying this on your own my advice is....DON"T! It's very difficult and you'll most likely burn through at least one extra kit. Ron and I install them together and even with four hands it can be tough, especially on Porsche bumpers :hairpull
Like anything though, the more you do it the better you get at it. We did a film the other day on a Porsche 997 under 2 hours.
Anthony