Powder Coating

Powder coating chips.

It chips when the lug nuts are tightened, from rocks, hub cab / wheel cover removal etc.

As it chips under the lug nut mating surface, your torque settings change too. (no one wants lug nuts to come loose when driving)

Paint will get flaws too, but paint is easy to redo at home.

Powder coating has its place at times but for wheels, it sucks.