I think I may go for this.
Meguiar's M2164 Mirror Glaze Synthetic Sealant 2.0
It's a giant amount, but apparently the only way to get it and not crazy expensive.
I'm thinking it's probably time to retire my Griots Machine polishes (1, 2 & 3) from 15 years ago. I dunno that shaking them will get them back to snuff.
I can go Griots again, but
Meguiar's Ultimate Polish seems to be highly rated.
EDIT:
This seems even better