Yes, the CD designation is "hard anodized" which is strictly a cosmetic treatment and, thankfully, wears off of the brake tracks pretty quickly. I had Open 4CD rims on my '96 Litespeed for a few years and the anodizing was gone from the brake tracks within 1000 miles. I sure didn't miss it and braking improved when it was gone. They worked fine with then current Ultegra pads.
Hard anodizing, despite the advertising claims, does nothing for rim strength, rigidity or longevity. In fact, it can hurt rim life as the brittle surface can act a stress raiser when (not if) it cracks. My rear Open 4CD rim cracked through the sidewall at 12,000 miles. It was the shortest lived rim I've ever had.