Flaking black MacBooks?

There has been a fair amount of discussion recently as to the nature of the matte black plastic that makes up the casing off the black MacBook. It has an almost rubberized feel to it, which is quite different from the surface of the white MacBook.
A post on marklemdotcom first brought up the idea that the surface of the MacBook might be coated with something that could easily flake off by scratching it with a fingernail. The discussion in this thread on the MacNN forums (and my own very cursory examination of the black MacBook) seemed to indicate that this was not the case.
But then today another post on the MacNN forums pointed out that someone on Flickr also had problems with flaking finish on their MacBook. The two problems don't really look the same — the first one looks like a clear coating was being rubbed off, while the second looks like black paint has been chipped off by the user's watchband. The interesting question is, why would the chips reveal what appears to be white underneath? Even if Apple used some kind of coating on the MacBook, wouldn't they have used black plastic underneath? It's possible that it's only the frame surrounding the wrist rest that is affected, but it's a little disturbing nonetheless.
Without more evidence, it's hard to say one way or the other. But I do know that my Pismo PowerBook had no such issues with the finish. I hope this doesn't become the "nano scratch" of the MacBook line.












