oh btw, I asked werkstat pretty much the same question and this was thier answer but I also wanted to get the input of experienced users of the products:
Hi there,
Thank you for contacting the Werkstat. We appreciate your interest in our products.
For most applications, we do recommend the Acrylic Series of formulas. While they work superbly on all colors, they are particularly well suited to the light colored paints that you would be using them on.
The primary differences between the Acrylic Jetts and Carnauba Jett lie in aesthetics and in durability. The A.Jetts present a very wet and reflective shine with outstanding clarity that does not tint the base paint color or hinder the appearance of metallics. The C.Jett presents a slightly more mellow look, a touch warmer and deeper. While the natural carnauba wax protects very well, it will not quite have the durability of the synthetic polymers in the A.Jetts. It is more susceptible to degradation from extreme heat and sun.
And if popularity is anything to go by, Acrylic Jett Trigger handily outsells both original A.Jett and C.Jett. You get all the benefits of A.Jett in a very easy-to-apply formula. Original A.Jett and C.Jett are just a bit more specialized in application and performance and offer options for those folks seeking particular attributes.
Hopefully this has been of some help. If you have any other questions, please feel free to reply back.
Happy Detailing!
Werkstat Customer Service
I must say they had a great response, and response time, and honest... who knew companies like this still exist???