To anyone that is (for whatever reason) still applying polish/compound/sealant/wax by hand, STOP!! Do yourself a favor and spend $50 at harbor freight on their dual action polisher. I bought one a couple weekends ago and finally got a chance to use it on my VW this weekend. In the past I've used the PC 7424xp, Rupes, Flex, etc. and while the HF da polisher isn't on par with the Rupes or Flex, for my needs, it's a great machine. At higher speeds (5-6), this thing does not stop spinning on character lines, though I did see it slow down on some concave spots at lower speeds (1-3). Marking the backing plate so you can see if it stops spinning is important. If the pad doesn't spin, you aren't correcting paint! I spent I think $15 on a Meguiar's or Lake Country (forget which, but it doesn't matter) 5" backing plate to replace the one the polisher came with, and another $30-$40 on 6 pad kit at AutoGeek (I chose 2 orange, 3 white and 1 black) and used Meguiar's Ultimate Compound with orange pad and Ultimate Polish on a white pad, then Meguiar's sealant (#21) on a black pad.
The order I worked in: wash (ONR rinseless), clay, wash again, then compound/polish/sealant, buff and wipe down with Ultimate Detailer. It's super slick now, looks awesome in the direct sunlight and has minimal spots where I didn't get all the fine spiderwebs out of. That could be my technique, but I think I just need slightly more aggressive compound/polish to get the really small, fine spots out. But, that also will take some clear coat down as well, so I may pass.
Anyway, I know this may be off topic for the OP, but I hope this helps. I have worked as a detailer in the past (on the side for my brother-in-law when he needed help), so I do know a thing or two about products, machines and techniques but I don't know it all. This machine really impressed me and for less than $100 on the machine, new backing plate and pads, I'm all set. Much better than spending (for right now) a couple hundred on the Rupes mk2 15 I was looking at
And yes, if you must use carnauba, apply it after using a sealant, 24-36 hours should be long enough.
Mike