PS. I must confess my recomendation of 2-3 coats of emulsion is for cielings (which usually are white) but i would still recommend putting a blanket coat of white emulsion over the lining paper. What this then does is seal it, and assists in hiding the joins. Also, if you happen to still notice...
you've gotta admit for the sake of what i understand is a small area of outline showing through, crosslining twice over is a bit much. I'd only crossline twice if the vast majority of the wall was in a poor condition, but if its just affected in one or two small area's, then a bit of pollyfiller...
You could just mix up a bit of polyfiller and apply it around the protrusion, then when sanded smooth you wouldn't have a ridge. When lined it should be practically invisible. Also, sometimes with 2 or 3 nice coats of brilliant white emulsion can hide some minor imperfections anyway, it just...
Hi Helen, well, usually the thing that causes paint to peel is usually damp related, plus a thing known as 'efflourescence' thats salt being released from plaster or masonry, and also if paint has been applied to a completely bare surface without being sealed adequatley beforehand.
Im assuming...