Zaino
ZAIO is a great base and then use Z2Pro a top, it is great stuff. KAIO and Klasse SG are still good but not as good since the reformulation. Werkstat is just klasse SG plus other additives. It is still good stuff, can't go wrong with any of those 3. Everything else is just not as good period. I haven't tried rejex, I know those Corvette owners like it. It is one of the few products I haven't tried.
Zaino All In One is simply the best product I have ever tried.
NO MODERN SEALANT IS HARMFUL TO PAINT. THOSE SILICONE HAVE LONG BEEN BANNED. WAX IS DEAD, SEALANT IS THE ONLY WAY TO GO..