You can apply Z2 and Z5 over any other Zaino exterior polish, such as Z6/Z8/CS/AIO/ZPC. Personally, I don't bother with more than a couple coats of either product, even when I do a full on Zaino job of the car. Most of the time I'll just wash the car with Z7 and give it a wipe down with Z6. If I feel like it, I'll add a coat of Z2 or Z5 in there, and since it goes on and comes off so easily without residue, it's not a big deal. If I'm really ambitious, I'll do a full Zaino job, wash-AIO-wash-Z6-Z5-Z5-Z2-Z2-CS. Just washing the car with Z7 and wipe with Z6 keeps the shine and beading action going for months.
I am looking into getting a Porter Cable 7424xp to apply the AIO. There are a few marks on the trunk lid that going over with AIO by hand doesn't take care of, and I don't want to use ZPC since the issue doesn't warrant abrasives. I've been told using AIO and a good orbital like the Porter Cable creates outstanding results. The Z2 and Z5 should still be applied by hand, so I've been told.
I am looking into getting a Porter Cable 7424xp to apply the AIO. There are a few marks on the trunk lid that going over with AIO by hand doesn't take care of, and I don't want to use ZPC since the issue doesn't warrant abrasives. I've been told using AIO and a good orbital like the Porter Cable creates outstanding results. The Z2 and Z5 should still be applied by hand, so I've been told.