No durability? I had Zaino last one year on a daily driver that is garaged at night. I was suprised when the owner/friend told me to use what I used last summer because he said he washed it finally about 2 weeks before I went there (back in July) for some bbq food, and he said it was really easy. Some shampoo (Z7), two buckets, a wash mitts, and his car was back into shape. I just made it look even better with a coat of Z1 then some new Z5.
8 coats of Z from one bottle? I can get 8 coats from 2 ounces. Sounds to me like you are using way too much product.
Well for the deepest, most reflective shine especially one white, what have you done in terms of prepping the paint?
Most products we use in terms of protection are mail order only, well in general are (Pinnacle, Blitz, P21S, Klasse, etc. etc.) Luckily I have a Zaino distributer near me. If I need Z, I can get it same day, sometimes next day (if I call late at night.)
The deepest, most reflective shine is achieve through proper prep. I wonder is a clay bar session and a session with a PC and some light polish or paint cleanser, then a dawn wash and Zaino would make a difference.