I did sandblast them a few years ago after they were painted black by the previous owner.
They looked like dog crap or I would have kept them black. I went with a titanium Nissan gray color. My car is still in winter storage and I hope to have it out next week. So I will get a picture of the new color up close.
I had to use a primer with a lot of filler to get the wheels smooth again before paint.

Hey I saw you sandbasted the nismo wheels to white do you happen to have a picture of your z with them on I'm curious to see please if you could thank you