A few Small Dog employees use the Magic Eraser to clean the base of their personal MacBooks. It works well, and it’s faster than any other solution we’ve tried. We don’t use it on customer machines as it is slightly abrasive. We generally use Simple Green diluted in water with a barely damp cloth on customer machines.
If you want to try the Magic Eraser on your MacBook, take care not to bear down on the machine while cleaning it, don’t let any liquid get into the machine, and don’t use the Magic Eraser on your screen. We recommend Klear Screen for that.