I am wondering the same thing, since I also got a free bottle of the DP Spray Sealant. I tried it out the other day after I alcohol QD'ed the car, because I didn't have time to do a full detail... anyways, its really great! Just a word to the wise, though, when apply around grills and such, first spray it on the towel. Otherwise it'll get all over the place and leave white spots.
My towels kept slipping off my hood, and I think it definitely allowed the paint flake to POP a lot. Not sure, though - might've just been a weird sun angle.