wall paper damage

[Don Hines]

Before I state my problem I need help with, I would like to contribute to the cause and tell you what I have learned about 45 year old wall paper and sheetrock.....
1. Pull off all you can that is already lose.
2. Score the rest with one of those nifty tools from Home Depot Or lowes.
3. Soak it down with a 1/2 and 1/2 solution of fabric softener and warm water. Warm water is important. Don't skip it. We didn't have any hot water in this project and used a Fry Daddy to warm up the water.
4. Wait until the solution does it's job before you start pulling more off. #4 is important too.

Now for my question. My hired hand butchered the job in a bath and pulled a lot of the paper off of the sheetrock. It would cost me about a Million Dollars to fire her; so, in an effort to keep peace I smiled and said "I can fix that".
I have tried skim coating and am finding that any moisture from mud or primer causes blisters under the paper.
My last try is to primer the whole thing then sand the blisters back down, and skim coat over the primer. Am I on the right track before I break my own rules and replace the sheetrock entirely.
Thanks a bunch for any replies.
Don