Yes, carnauba is very good stuff, but be careful using it in liquid form. The wax is a solid naturally, so in order to make it a liquid, its mixed with a lot of solvents which can decrease durability and its natural properties.
For me, its all subjective. If i'm looking for a little short-term depth and don't care about durability, its S100 all the way. You can get the stuff at your local harley dealer store. Its the same as P21S, just in different packaging, and $10-15 cheaper.
I've recently been doing my bmw, and a few of my customers cars with Einszett (1Z) Glanz Wax. Its interesting stuff ... one of a kind. Its a liquid with the consistency of water. I spray it on an applicator pad and apply ... goes on and comes off very easily. Its synthetic and is supposed to last longer than the average. Its not as durable as a polymer sealant, but its longer than carnaubas.
I still need to play with meg's NXT though ... i hear that for the most part, its the best you can get "off the shelf" from say, Autozone.
and schneider: he asked "which waxes/polishes/cleaning products do you use to keep your bm looking sweet?" he didn't ask "which is the best?" so either you don't use wax ... or you're too lazy to post it? no offense, but you already took the time to post *something* so why not just tell him what you use?
<span style='color:blue'>1992 325is
I think i'm in love ...
"Racing in a honda is like racing in the special olympics ... even if you win, you're still retarded."</span>