I know someone who is getting a Macbook and will use it at his job. Thing is his hands get really dirty and no matter how much scrubbing etc.. is done they still dirty things up. He has an iPod mini and it has some grease marks/smudges on it. He doesn't want this to happen to his Macbook. The thought was to go with the black Macbook which should hide any of that, but regardless of color what could be used to protect the keyboard and general surface of the laptop?