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Why not skim it yourself? Doesn't need to be perfect where the tiles and cupboards will cover it and any imperfections in bits that will be painted can be fixed with filler & sandpaper.
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Discuss How to treat these walls? in the Canada Tile Advice area at TilersForums.com.
You'd do it in a day for the price of a bag of plaster. Wait for it to dry though before you try and paint it or stick tiles to it.
Reply to How to treat these walls? in the Canada Tile Advice area at TilersForums.com