polymer, not carnuba
Used a polymer wax for the first time 2 months ago. I used Griot's One-Step sealant. Meguire's NXT is supposed to be quite good. Mother's makes one, Calif Gold Synthetic. These are easier to apply, easier to remove, last longer, work on black trim and rubber instead of discoloring it like regular wax. Heck, I use it on the windshield. Beads rain like a mofo.
Def def def go polymer.
Wanna get really schmancy? Have them clay bar it, then use a polymer wax. it'll be so smooth and slick, unbelievably slick and shiny and oh so nice.