From my experience living in Florida, under summer conditions of intense heat interrupted by drenching downpoors, followed again by intense heat- my favorite product that wins absolutely by far, is Jeff's Werkstatt. It lasts for a minimum of 4 months at a time in those conditions- Not garage kept, and washed once every week and sometimes every other week. The other products I tried and gave a seriously fair chance were zaino, zymol, klasse AIO, Megs Gold Class, Liquid As$, Natty's, EX and EX-P, Optimum spray, Mother's Reflections, and a few others I can't remember. None of them lasted more than a few weeks while at the same time having the gloss of a carnauba. EX and EX-P lasted a month, but didn't have the ultimate gloss. Liquid Glass always looked cloudy on metallic finishes. Optimum- well not much to say except I couldn't tell it was even waxed. Zaino looked good but didn't last. Klasse AIO looked pretty good on some colors but always needed a topping with Natty's or some other carnauba.
When I say it's still waxed, what I mean is that when it rains, the paint still beads up. And when I dry the car after washing, it feels like silk, not rough. And when the sprinklers get the car and it dries in the sun- the spots literally wipe right off without a buffer.
For almost a year now I haven't touched any of my products except to wipe the dust off them- Because I'm extremely happy with Jeff's Werkstatt. I use Prime Strong to clean/polish. Then I finish with Acrylic Jet Trigger as the final gloss. It goes on and off easily, and looks like a carnauba finish. Then I don't have to reapply for months.
x5 coats should do it