On the other areas of actual paint chipping/losses... Surprisingly the remaining paint seems to be stuck to the canvas quite well and pretty stable..
I can't be sure but most of the damage seems like it was stored where something was able to rub against the surface and scrape the paint off in places.... But once restored/framed this will be an impressive thing to hang on the wall. I hope somebody out there sees the potential in this and fixes it up... That was my plan many years ago but sadly im not going to get around to it anytime soon so on to a new home it goes. Im not 100% certain but I think I still have the old frame this came in but it was loose at the corners and is now fully apart in 4 pieces and needs refitting.