My findings (non scientific of course)
#26 on rear bumper: aprox. 6 weeks was recntly removed). Water beading good for about 3 weeks.
#16 on hood: good beading for 2+ full weeks before I applied another coat just for looks.
AIO on rear of decklid (hard to say since it is a vertical surface. Slickness was gone after about 2 weeks.
SGx2 on spoiler: aprox. 3+weeks, but beads were not tight. Slickness goan after about 2 1/2, but i believe this was more due to overspray that got on the car while at the shop.
ClearKote CMW on side panels: about 3 weeks, but then i applied
#16 for kicks and giggles.
After the recent strip, I now have VM topped with WG on hood, decklid, and side panels. I will be applying AIO and EX-P on my roof probably tommorow evening.
Never used Zaino, so I hae no refernce as to it's durability. And as I have been used to quick degrading products (devout user of 3m's Pink Fill N Glaze for years), I'm not sure if I really care. However I would be dissapointed if WG did not last more than a few weeks, considering that they claim protection for months not weeks. But then again, maybe slickness has little to do with a products protective ability. I am seriously thinking of going into car care as a part time gig, so whatever I buy would have to be worth using.
Not to sound to suspicious, but how would we know if the testing was not biased?