Zainos all the way.
I told my dealer NOT to buff the car in preparation for purchase and it has nary a swirl in it that I can see. I haven't clay barred it, yet, and applied the full Zainos treatment because the paint is so darn smooth, but I have all the stuff from previous cars to do so.
If you can avoid the jack wagons who lay a buffer on your car, that would be best. Good luck to you apartment and condo dwellers. When I lived in an apt that did not allow washing, I used to fill a bucket with preferred soap, drive over to the u-spray-it car wash, feed in a quarter, wet the car, wash and rinse as needed, and then dry.
None of my cars have ever seen an auto car wash or a detailer. I'd rather drive dirty, but that's my choice. No stones thrown, honest.
