Or from a scratched label side - most people aren't aware the label side of a CD is far more fragile than the "shiny" side. I see them constantly flipped on the label side on a table and cringe as that disc won't be playable very long. It's a much different story on DVD/BR as the silkscreen label isn't applied over a thin epoxy seal on the substrate but on a plastic top layer.This only works if it is surface damage from scratches and/or junk on the surface, such as dust, peanut butter, grease, fingerprints, etc ...
It is a whole entirely different story if the damage is in the resin layers, and/or from "rot".