On 04/17/2021 11:24 AM, Antonio Carlini via cctalk wrote:
If anyone has any suggestions for how to clean CDs to
recover data, I'm all ears.
If by the "data side" you mean the clear side the CD is read
from, those can be polished with toothpaste or plastic
polish. Modern CD/DVD drives are much better at reading
poor quality disks.
If the data layer is scratched, they are likely
unrecoverable. That is the side with the label on it, and
the data layer is only a few thousandths below the label.