Aluminum is reactive so if your skin chemistry is just right it might do something, but I doubt that severe. My skin is somewhat acidic so when I go on a long drive in the car, especially when it's warm, my aluminum shift knob turns my palm black.
Almost sounds to me like it's a build-up from exposure, unfortunately. That could mean that even if you were to quit your job and quit the mb's and everything mechanical and take up knitting or something, it would likely persist for some time
Now might be a good time to at least give some homeopathic remedies a shot. See if you can find a _good_ naturopath in your area (not some whack-job).
You can try a paste made from fresh garlic..it has antiseptic qualities.