A lot of the "greasy fingerprints" are the plastic being worn out by constant friction. But people are morons and think it's grease.
As to that tool in the thread insinuating that this only happens with dirty hands, you're wrong. Different MacBooks use different plastics, some of which get dirtier than others. My replacement palmrest on my old white MacBook did not discolour nearly as much as the original.
Mr. Clean Magic Eraser will bring it back to new, but it is slightly abrasive and will wear the plastic out over time. But so will your hands.
As to that tool in the thread insinuating that this only happens with dirty hands, you're wrong. Different MacBooks use different plastics, some of which get dirtier than others. My replacement palmrest on my old white MacBook did not discolour nearly as much as the original.
Mr. Clean Magic Eraser will bring it back to new, but it is slightly abrasive and will wear the plastic out over time. But so will your hands.
