Loose Skim Plaster
My question is: would I need to reapply a skim-coating? Could I remove the skim-coating from my walls, apply the shellac, and paint without replacing the skim-coat? And, do you have any tricks for removing the skim-coating that is still bonded to the gypsum base? This would be a much easier solution than drywalling over the walls or reskimming.
Thanks in advance.
Shellac is a bond breaker
It may last a little while.....till some moisture hits it....then you'll need to start issuing hard hats at the front door!
Just remove the loose white coats and install new white coat with lime/gauging mix.
All will be just fine then.