(Kerry, please feel to delete this.)
Stereo, do yours turn into zombies and start gobbling up other disks, then they roll into Players and turn themselves on, endlessly, just like other Zombie Disks do? (I really hate that. Wake up in the night, seeing a bunch of infected disks rolling and hopping, swaying back and forth like Triffids or something. Gee, I don't like Surface Tablets doing that on picnic tables - why would I want my fungi disks to do it either? I don't!)
I haven't tried that 120-grit, by the way. Hubby said to use the ballpeen and awl instead, especially if I suspect bad-sectors. "Go ahead and punch them out." I learned that if I super-heat the awl tip, I can cauterize those bad-sector edges, too. Get the hotdog on the sticks, and leave the awls in the coals for a while... all-in-one cooking!