I have some 10 year old Kodak Picture CDs. One of my drives recently had problems reading one of them, so I did some scans with a different drive. They all have C2 errors, but the TRTs seem weird - they all have a gap near or at the end, but they didn't fail.
I attached a couple of the TRTs, and one of the DQs. Fortunately I was able to use the other drive to copy all the data off the discs.