Ok, here's the bare wall. The different colours are different layers of plaster. The top layer is loose across the whole wall, the layers below are more consistant but still loose in places. So what's the verdict? Strip down to the base layer and replaster, or attempt to patch? Any thoughts...
Against my better judgement I decided to remove the lining paper on my bedroom walls and paint directly on to the plaster beneath. I suspected I would need to do some patching and sanding, but it turns out the paper was the only thing holding the walls together. In some places, several layers...