I've had 22.5" wheels grit blasted, powder primed, and powder coated. The finish is extremely durable, no issues mounting tires or chips for any other reason thus far.
I've also mounted tires on freshly painted lock ring wheels (for a fancy old car) without damaging the paint. I feel that good powder coating or paint would be about the same.
It is true that you can't powder coat to touch up a chip, but you can paint it same as you would a painted wheel with a chip.
