It will if they are water mark stains and its oil based unders..
I recently had a whole ceiling, bare unpainted artex, the bloke who had the place before must have smoked for the British Olympic team!..couldnt wash it down so I treated it with a 3:1 water bleach mix and then mixed PVA in with the first coat of matt emulsion...allowed to completely dry and then second coated...still looks good now.
The type of brown stain to be expected after a screw has been put through a central heating pipe ... !!!!! - nothing to do with nicotine just an embarassing, unfortunate mistake
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