So I might differ with my pal CRPWGOTITBACKWARDSJB just a bit.
First if you are going to mix synthetics with carnauba then you want the most durable on bottom meaning the synthetic. A good base of Epic will last far longer then the carnauba. If you reverse it your carnauba will wear off taking the synthetic with it. So carnauba if you must, but do it after a good polymer wax like Epic. Hydro on top of carnauba may help it last a bit longer, but I doubt it.
Now as far as wax applicator I can recommend something like this:
from Sonus. The black side is soft for wax and the yellow side is a bit stiffer and good for polish. If you're using a liquid wax like Epic or Zaino then something like this:
works pretty well. You can find both at:
http://www.autopia-carcare.com/applicators.html
