Found from Digg: http://digg.com/apple/MacBook_discoloration_not_caused_by_oil_or_perspiration_
If this is a dupe I apologize, I did a quick search and didn't see this anywhere.
http://5thirtyone.com/archives/419Despite applying the Shieldzone Standard kit to my MacBook palm rests and trackpad, the yellow discoloration is forming UNDERNEATH the film. Apple, the discoloration is not caused by oil or perspiration! This is a serious manufacturing defect which needs to be rectified! Where is the product recall?
If this is a dupe I apologize, I did a quick search and didn't see this anywhere.