I have used Zaino for about 10 years now.
Not a lot of work, not a lot of hard rubbing, but you don't get the real effect until you get three coats of z2 MINIMUM. 5 coats is better.
Then you wash it with Z7 and put another coat on maybe weekly if you are nut (or young!) or once a month like me.
THIN COATS ----> VERY THIN COATS<----- is the secret!
Won best in show at Two corvette shows in my 88 vette, daily driver in 1999 in Dallas corvette shows, and 1 class winner in 2000 with my 99 miata daily driver.
Best there is IMO.
Easily beats MeGuiars, which is better if you are not a nut about it.