OK... disk errors:
Oxide scraped off the surface. You can see wear on the disk oxide. Depending on how much oxide is gone, the data may have gone with it. Be very careful if you see oxide damage. Oxide will build up on the head and then wipe out the next disk you read.
End-of-life or contaminated disk jacket. This will impede disk rotation, causing random errors. You may have to cut open your disk and move the platter to another, good sleeve. You may need to clean mildew/mold off the disk with dishwashing soap and a soft cloth.
Disk written off-speed or off-track. These will normally be repeatable errors. I keep a 1050 that is used to read these kinds of disks by tweaking the servo and speed control until I get a good read.
If the disk was readable at one time, you can usually read it again - if the oxide is OK.
I don't know where my 'fixer' 1050 is, but I can maybe read your disk for you. PM me.