Hey guys, I have an eMac here with a very ... odd set of screen markings. It has patches of 'dull' gray all over it that when looked at with a bright light kind of refract the light somewhat like spilled petrol would. None of it will come off with anything I've tried (white spirit, rubbing alcohol, glass cleaner, etc, etc) and I'm starting to wonder if there was an anti-glare surface put on during it's manufacturer that has started to wear off in places? I've attached a photo - though it's hard to really appreciate unless you see it in person, a patch of purple can be seen in the reflection of a bright light in the screen. Anyone able to identify this weird marking? Or even better tell me how to get rid of it? Thanks in advance!