HDjr,
You're on the right path with the Zaino and
Menzerna.
Keeping your clearcoat in perfect shape however doesn't have as much to do with which products as it does with which technique you use when washing it (or whoever you have wash it) on an day to day basis.
Proper wash technique would look something like....(how I used to wash my 02 black Vette)
1 Clean and treat rims, tires and wells first with a Dawn soapy water (cuts grease and oils)
2 Zaino Car Wash with two buckets (one for rinsing mitt and one for fresh/clean soapy water)
3 Use multiple mitts, one for top panels and one for side panels, and one for behind wheels and lower panels.
4 Rinse
5 Dry with high velocity electric leaf blower
6 Touch up drippings with MF towels
7 Door jams and windows with MF towels
8 Hit it with a shot of Z8
.....weekly and monthly treatments of Zaino products never hurt as well.
This will typically take you about 45 minutes but will significantly reduce your accumulation of swirls.
Good luck, Josh