Quote:
Originally Posted by TH0001 
Since carnauba wax becomes unstable at 170 degrees and melts at 181 degrees, we must remember that it softens at tempatures far less then this. In Florida, this means that anytime the car is outside (9 months of the year) the tempature is such that the actual wax is soft. This means contaminents can "stick" into the paint easier and IMO, are more likely to become embedded.
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Carnauba wax is blended with other products which raises the melting point (when applied to the car) sort of like how coolant raises the boiling point of water.
We regularly top 100 here in the Dallas area in the summer and even using carnaubas exclusively on the black 626 (that sits outside 24/7) I used to have, I never had any problems even when going 3+ months between wax jobs.
I regularly use both sealants and carnaubas on customer's vehicles and haven't noticed a difference between with two with respects to bonded contaminents. Granted, we don't have any heavy industry here so that may play a role.
I use Carnauba Moose (which is a liquid) more than paste carnaubas, CMW being a liquid carnauba may have something to do with it as well.
With respects to Zaino, I've always had good results using it, but IMO, Werkstatt is a better looking sealant (although I'd give Z5 a slight edge on solid black) and easier to use. Lasts every bit as long as Zaino does too, and that is based on using both on the same van that only sees tunnel washes. No QDs, no ONR, nothing. Both held on for a good 8 months.