So the time has come to make amends. I have seen a few videos on YouTube about skim coating, so i’m ready to make a complete hash of that too. My only relief is that i can hardly make it worse than it already is.
Question: the existing paint is a latex semi-gloss. Might there be any problem with adhesion of the mud? I’d plan to wash thoroughly with TSP, but do you reckon it would help to roughen the surface with steel wool as well, before applying the skim coat?