This started with just the ceiling in a bathroom, but really has evolved into another thread regarding - how to handle patching the micro cliff edge left with peeling layers of paint & where they meet bare wallboard.
Don't know what the experts would do. I've done a lot of painting and corrected some awful paint jobs.......peeling latex paint from doors that had been applied over dirty, gloss enamel. Argggh! What I would try with what you describe is: go to a good paint store and get a heavy bodied primer. Apply primer with short-nap roller. Let CURE, not just dry. Sand with fine sandpaper, clean up dust, roll on two coats of paint of choice.
I've spackled those torn paint edges and it is an experience in frustration because the spackle coat is too thin to fill in. Sanding latex paint can also be a mess, as it tends to roll off smoothe surfaces rather than abrade.
All things considered, the easiest solution would have been to just rip out the drywall and install it new. A lesson from all this is to think ahead and figure out what is the total solution for one small test area first. If you had realized in a small area that not only was the wall paper a bitch, but what's underneath needs to be skim coated, you could have switched strategies.
At this stage, it sounds like the only other option is to skim coat the walls, as someone else suggested. I've never attempted to do a whole wall and my first thought would be it might be worth it to get a pro in who can do it in a fraction of the time, fraction of the mess, etc.
Another possibile quicker solution would be another heavy wall covering.
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