EXACTLY!
The thing with Zaino is you apply it a certain way, and put it in thin coats. Approx. a 3oz bottle will be more than enough to do a car. When you first start you really have to pay attention, because you won't hardly be able to tell where you've been until it cures. But the protection is unprecedented.
I go through the wash quicker than anything, because I'm always washing 2 cars in the summer or whenever weather permits. 2-3 capfulls per gallon is literally all that it takes to wash a car....wheels and all.