Paul Stamatiou has a MacBook and he is concerned about the possibility of discoloration. What's a geek to do? Why, apply ShieldZone's Invisible Shield plastic protector, that's what.
Paul says that applying the shield isn't easy, but it isn't hard either (how's that for a review?) though an extra set of hands is recommended. Overall, if you're worried about sullying your precious MacBook Paul says these are for you.