the inside of the flangles will look fine, and continue to do so for quite some time. however, the outside of the flanges on the pedal grab side might start to look iffy. other than that they look fine.
I spray painted the widened Suzue hub on my Coker. I painted it black to match the black frame. So far it has held up fine. No nicks and no chips. It looks great.
A more durable option would be to send the hub to Darren Bedford and have him get it powder coated. I was considering that option, but I didn’t have the patience to wait. I wanted my wheel built ASAP so I did the quickest option and spray painted it.