I have two set of oem wheels that I have had powder coated.

The first set I did was oem 16's from a rodeo.
The other set I did was the oem 18's from a '02 Rodeo ( Isuzu offered the left over vx 18's as an option in '02)

You can look at my pics and see the wheels. I did these about 6 to 8 years ago. 50k on them and they still look great, no problems at all.
the plastic center caps I had to spray with rattle can bed liner product to match.