Hi! A few weeks ago I started this thread and got some fantastic advice: Stripping wallpaper - what is this in the photo and how to fix?
I am cross-posting this into this forum in hopes that the same kind people will respond.
I decided to do one section of the downstairs of the home at a time starting with the hallway. I tore down the paper, washed the walls, sealed with GARDZ, patched with joint compound, resealed with GARDZ, primed, and painted two coats. The hallway looks great - smooth, no bubbling or other issues.
I started to work on the large wall in the family room tonight and it's a disaster. They wallpapered OVER wallpaper and in some parts the first layer of wallpaper was put directly onto the plaster or directly onto some sort of putty they used for patching. The plaster is crumbling away in chunks. Will the steps I followed to do the hallway work? I would seal the wall and work on patching everything up with joint compound, but I am wondering:
Do the walls need to be re-plastered or patched with plaster instead? If yes, what specific product do I look for? I read that a product called EasySand could be used for this. Would that do the trick?
Here is an image of the current mess: http://imgur.com/1Eem6rP
Here is a closeup of the plaster crumbling down to the concrete: http://imgur.com/mko9NsI
Thank you for the advice.