A small colored Apple logo is integrated in the display bezel. The first models in tangerine, blueberry and graphite show very often tension cracks around this logo, the firewire Clamshell iBooks seldom. Immaculate translucent bezels are hard to find. You may buy a display bezel with a different color and switch the Apple logo which can be popped out in one part backwards. Be sure to buy a translucent or opaque bezel according to your model.
Detailed view of the small Apple logo - popped out