As far as waxing, there are spray-wax products on the market that don't chalk up satin finishes.
I remember BMW warning buyers of their satin cars to avoid bird droppings at all costs, but that's a different clientele.
Depending on what the OP is doing, might be easier & less spendy to use a matte decal/applique/vinyl wrap instead of paint.

I like the subtlety of a black matte stripe or hood patch on a gloss black car.
Plenty of other things are done to death in my opinion, but we can have another thread for that.