We have a couple of areas in the house were we have a problem with damp salts etc - I have a contractor coming at the weekend to repair the affected walls - but it involves hacking plaster right back to original stonework so will not be able to re-paper for some time.
So in my wisdom decided to strip the other walls of the vinyl wallcovering and just paint once plaster is dried out - BUT in several areas when we've stripped the paper it has also taken off the underlying 3 coats of paint so am now left with walls that are a mixture of bare plaster and paint. Obviously this means I need to get all the paint off and get the whole room back to bare plaster or is there another way to get a smooth finish. I was so sure this was going to be easy!
Do you have more paint than plaster or the other way round? If it's only a few bits of paint left then scrape them off. However, I suspect that the outer surface of the plaster has degraded which is why the paint came off and where the paint has gone you may well a rough rather than smooth surface.
You could try finishing skim polyfilla or the new "smoothover" stuff. But the latter is rather expensive for what it is and I don't like it personally.
My preference would be (without seeing it I might add so the usual disclaimers apply) to line with a good quality lining paper (not less than 1200 grade and preferably 1400), render the seams invisible with filler and paint over the top of that.
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