I'm using gyeon quartz products and the paint work will get an additional coat of siquartz wax (from a company called valeting products)
The finish and protection all comes down to the prepwork.
I rinse, snow foam, rinse, wash with shampoo (2 buckets, 1 with soap 1 with water to rinse the mit) fallout remover, rinse, clay bar, wash again then dry (pat dry not rub). Machine polish but only use cutting compound if needed, I tend to use normal polish and change the head on the polisher. Panel wipe the body then polish by hand and start applying the sealants and waxes.
I change cloths regularly too.
Interior and glass gets fully cleaned and protected too.