CDROM bit rot is mostly the paint flaking off, but the real data is stored in the plastic. DVD should be even harder to bitrot because data is entirely inside the plastic. Burned disks are another story.

You must be joking. Try to scrape off the paint and keep the plastic, see if it works.

bitrot is paint flaking off, not someone purposefully scratching it off

It is primarily humid air diffusing through the platter and corroding the aluminum coating. The "bits" are sandwiched between two layers of plastic (one thin). The paint on the surface is irrelevant.