Another drawback for Zaino is that it requires a significant chunk of time layering and only delivers results that are equal to or lesser than Klasse.
If you're in search of the perfect shine, you are far better off learning to polish with a rotary buffer or a PC. In fact, 90% of shine comes from good prep work. There is a man on Autopia with a line in his sig that says "no prep, no pride" and it is so true. A full exterior job will take 8-10 hours, sometimes more for paint correction in the region of 95-100% - especially with a layered LSP.