Removing old plaster from the shed walls isn’t really something I enjoy. However, it’s damp, so it needs to come off before render goes on. It seems that the walls had been painted blue, I’d guess that was in the 60s, when the shed was used as a taxi office. There’re also traces of an earlier green (20/30s?).
It was a shame to render over stone, but I really couldn’t be bothered to rebuild another two walls, with a damp-proof membrane.
But now I only have one wall left to render.