syplace,
Just a thought/suggestion. You could call the Repair facility and ask them how they fix such a thing, and maybe some one can tell you what the ceiling is finished with. I thought it was vinyl too.
I think one of the gals was asking about this a few months ago, thought she said she was gonna dig out the putty and put in new?? Have you tried the Archives Search??
Ours is starting to turn a little yellow too, and we are non-smokers, and don't burn candles in there either after some of the comments we read here at MOC about that. For now, I was going to try to ignore it! GULP!
Carol