Full disclosure: I also cross posted in a very old MacRumors thread, but odds are that few folks will see that. And I'm pretty desperate for advice on this issue. The anodized edges to the right of my trackpad on my two-year-old MBP (a late 2008 15-inch unibody purchased in spring 2009) are worn off. This in and of itself is, I know, a fairly common problem. But I haven't seen many folks complaining about the result I experience: A black mess on the forearm and palm of my right hand. The bad blackberry photos of the edge and the dark marks don't do either justice, but they can give you an idea. Since I'm using my machine all the time for work and play, I had resigned myself to living with these temporary aluminum tattoos, which used to be fairly mild. Not so anymore. Now, I look like an ink-stained wretch after just an hour of use. I'm tired of having black ink marks all over my forearms that don't ever come fully out with scrubbing in the shower. And, really it just isn't a good look with summer sundresses. Has anyone had any success applying clear nail polish, to help seal exposed aluminum and limit the oxidized aluminum wearing off? What about other techniques, including applying wrist guards? FWIW, these worn edges are precisely where my skin/body comes most into contact with the machine, and where there is repeated motion that could add to the wear. I am right handed and I use my right hand to manipulate the trackpad. By contrast, the left side of the laptop shows only a little bit of wear at the very edge, and the resulting aluminum residue on my left forearm is faint. Thanks, Jen.