ACE
What's that smell?
I've been using this quick technique for Zaino when I or a customer doesn't want to get overly fanatical and it's quick and works well: Work one panel at a time. QEW, clay, using S&W as a lube. If the panel really looks good, a quick spritz of 50/50 Isopropol/water, Z1/Z5. If you want something extra, throw in a quick application of P21S cleaner after the clay. It's that alcohol spritz that gets the surface oil free. On cars that don't require defect correction, it works like a charm. I'm sure more extensive rituals might allow the Z to last even longer, but IMO, Z will still outlast anything else by a wide margin used as I described. Try it. As an alternate, bucket wash the panel, clay using car wash/water in a spray bottle, wash off with wash mit. Dry the car, alcohol/water spritz, Z1/Z5. Super quick except for the drying time of course.