Al Kossow wrote"
Try pulling the media and cleaning it with Weber
Costello Markerboard
Cleaner, then let it thoroughly dry.
I wonder if you could pull the media and apply a spray coat
of very fine, very hard lacquer. That might smooth the surface
and hold the oxide in place long enough to get a good read.
Otherwise, I wonder if you could apply that solution that you
used to use with mag tapes. That stuff that makes the flux
transitions visible. Then scan the disk with a high resolution
scanner and see if you could decode the image.
Bill S.