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[Rant] I am too dumb to be left alive. I just tried to clean a CD with Isopropyl Alcohol...
(i.imgur.com)
It waited 31 years just for me to do this.
The damage was done from label side, however with CDs there's just a thin lacquer layer below the label and that's it.
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Which is why you also shouldn't write onto CDs with permanent markers.
DVDs on the other hand have a relatively thick plastic layer on top, offering fairly good protection.
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Edit: Added white background to 1st image
Can’t CDs also have two layers of plastic? I thought it was just cheap CDs that printed the label directly onto the data layer.