When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Pretty hard to match factory colors exactly. You would get a color that is "close" depending on powder product line. Also, most powder coaters will charge a little more (or a lot) for one run of colors. In other words, it's a better bargain if you use a color that they are baking already. No set-up change=savings to you. With that in mind it may be better for you to paint.
I've had two sets of oem wheels coated and love the results. If I were to do it all again I'd just paint them. I found a company that sells rattle cans of OEM paint for @ $27.00.
The powder coat will last longer due to better adhesion, harder but not brittle finish, and more chemical crosslinking of the resins than a 1 part or even 2 part coating system but it would be harder to do a color match.
Not OEM wheels but I did have my wheels painted body color. The company I used was not cheap but they did a great job matching the Royal Grey. Good luck!