I used about 1/2-3/4 of the syringe to do my car. And when I say I, I really mean David Saunders applied 90% of the car. So I am sure it was don't properly. The beading dropped off at 2 years and it still cleans up well, but is a pain to dry. I am an Opticoat fan. I was told by Dr. g to clay it, did that, then to wash with an APC did that. I was not able to revive the beading properties. In all fairness the GTech EXO petered out at 2 years as well.
Seems like 2 years is the new limit on coatings. I am sure a new technology will come out sooner or later to give super hydrophobic, mar resistant LSPs a reality.