I recently applied waxes to both our vehicles, I say it was for some extra protection, but I think it was also some detail therapy for me.
I used TWHS Graphene Infused Wax on the FJ, I bought it on clearance for $10. I wish I'd gone with Collinite 845, or Dodo Juice Light Fantastic, which I forgot I had on the back of the shelf. The TWHS stuff seems to have good hydrophobics, but hasn't done much for the gloss. Also buffing it off the white roof was a bit more difficult than on the silver paint. I'll be interested to see how it goes on the next wash.
On the Qashqai I used Dodo Juice Blue Velvet, which a very pleasurable application, and the results were stunning. I haven't had a chance to test out the water behaviour yet.
Both vehicles have NV Lustre and Jet sealants applied about 6 months ago, which are holding up fine on both, but I decided to add something extra for protection as we head into the days with more daylight, and stronger UV, just like for me, I've started putting the SPF50+ sunblock on when I go out.
Gyeon Wax sounds interesting, I may have to check it out, I used to have Wetcoat in my arsenal many years ago.