Comment Re:Grammar (Score 1) 329
That layer of oxide is normally not present in CDs because they're sealed in plastic. Let air get in there and you see all sorts of funky things. I have some CDs from the 80s and I can see some sort of almost mold looking stuff creeping in from the edges on a few of them. Last I ripped them they all still played fine but I don't expect that will continue forever. Disbelieve if you wish but this is real and I see it occurring with my media as of a few years ago - haven't cracked the box to look since but I doubt it's gotten better. This isn't a plastic issue, it's the aluminum itself oxidizing aka "rusting", you can treat the plastic or polish it and the creeping crud is still there.