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I use Collinite 476 double coat paste wax. Put it on thin with foam applicator and buff early for ease of removal. I do two coats and truck looks terrific. I clay my vehicles but do not polish to any degree - the desert challenges the clear coat enough as it is; polishing to a mirror just reduces its thickness, leaving less for the sun to evaporate away.
Wolfgang Deep Gloss Paint Sealant topped with 845. Autogeek sells it as a combo. It lasts quite awhile if you let each coat sit before wiping it off, IMO.