A little red paint and it's good to go. Can't stand when they just leave a primer finish.
I was lucky enough to have Rick show me the correct way to apply it and I'm sure it made it much easier, because I would have been using WAY too much. You just start with two sprays to the applicator, one on the left half and one on the right, and after that it is about one spray per panel. It's weird, because you don't really see it, so you don't think you are using enough, but you are. I think that is the only "difficulty" in using it, is the chance of people over applying it and getting streaks. You can buff them out if they don't level themselves, but it is much easier to just get it right the first time. A little trick for when you aren't sure if there is still some on the pad.....wipe it on a window, and you will see if there is still product on the pad. Also, you should apply it in circular motions. Originally it was recommended to go back and forth, but they have changed that due to the fact that you could leave start and stop smudges doing it that way. I haven't used OS or Z's version, so I can't make comparison's to them. I was originally turned off to UPGP due to the price, but once you realize that you use a tiny amount to do a car, the price per application is very good. The sample size is more than enough for most people as well.