I just picked up my 328xi Jet Black a few days ago. I asked the dealer not to do anything but hose / wash off (no wax).
After I picked it up I drove home into the garage (heated to 65) and then spent 3 hours doing the following
1. Washed the whole car (was going to clay but the paint was in good shape)
2. Applied 1 coat Zaino AIO
3. Applied ZS Clear Seal
5. Wiped in with Z6
Two days later it rained during the day and I have to say the car shed water very well. I washed it with ONR & another coat of Z6 again but so far the paint is flawless. Can't see any scratches in the clear coat. I've been very impressed with Optimum No Rinse. I can now wash my car in the garage all winter long!!!
Tough to beat the shine of a Jet Black car that is freshly waxed