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(Andrew Gabriel) wrote in message ...
"a" writes:

4) When skimming over an existing skim coat that has had several layers of
wallpaper on - is it imperative to get every last bit of paper off or can
you plaster over it (I am guessing if you can plaster over paper joining
tape etc then you can go over those stubborn bits of paper that get left
behind?)

I guess if the worst happens it can always be scraped off )

You can skim over anything, providing the surface isn't in
danger of coming loose. The problem is that the surface you
skim needs to be flat.

and hard, which paper isnt. If it all stays stuck, the skim over the
paper will be as weak as anything, and if any paper comes adrift while
plastering, youll never get the plaster to stay flat, it'll slump
after every attempt to flatten it. Off it needs to come.

The good news is that just scraping it off with something fast that
damages the surface a little wont matter, as youre skimming over it.

NT