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Gritty Walls
Interior walls have been covered with what looks like a mixture of sand and paint. Some of this is coming off in bits. The owners suspect this surface was put on to conceal cracks underneath, but wish to put up wallpaper. Does the gritty stuff have to be removed, and if so, how ?
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For more on marking an answer as the "Best Answer", please visit our FAQ.Sounds like it's the dreaded polytex that was on the market in the 70's & 80's. I'd try different methods of removing it. Apply warm water with some fairy liquid & give it a good soaking, then get a 1" filling knife to try & get between the plaster & the textured paint. You could also try a steam stripper. Sanding it with an orbital sander. If all else fails you might have to have the walls re-skimmed.
You may be on to a loser trying to sandpaper sand. If some paint has flaked off just feather the edges of the 'holes' with acrylic decorator's caulk using a spatula and a damp sponge. If you paper over with a matt finish or slightlyy textured paper the 'holes' won't show. Just doon;t use thin or shiiny paper.
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