I've been using Nu Finish on this current rig since new and have to say, that it is great stuff. I have found that the paste is the best in regards to overall durability vs the bottle. It goes on creamy and stays slick after numerous washes. My unit looks like it just came off the line, decals and all. No buffing required, just frequent rag changes and a dry day for the best results. My unit takes an entire can for one waxing, which I do twice a year and just did the fall application to get me through the winter.
I've used a lot of products over the course of owning boats and RV's and this is so far the best product I have used to date. Almost all of them go on and off the same and give a similar result for the first few days. I am basing my opinion on durability which the Nu Finish paste is well above the others used. This second waxing with the new paste went much easier than the last due to the unit still having a good base and no chalking...JMHO.
Many people have a favorite which trial and error will get you to yours soon enough.
2014 375 BHFS Eagle Premier
2014 Ram 3500 Longhorn DRW CC
6.7 CTD, Aisin, 4.10's