I've searched quite a bit, but was only able to find detailed reviews of Acrylic Jett. Please post any insight you have into Carnauba Jett. How easy is it to use? Is it as easy as a QD? Does it have any darkening characteristics? How long does it last? How does it perform over metal flake vs. light vs. dark colors? Are many acrylics involved as well, or is this mostly carnauba? Does it bead well, etc...