Hello, we had a wall re-skimmed to fix a previously blown area of skim. However this skim cracked so i scraped off the area and i've had to stop before i take the whole lot off. I can get my scraper behind both skims and its coming off in sheets. I'm exposing the old plaster. Now, do i get another plasterer in to re-skim or can i clean up the old wall and paint that? I'm fed up with all this now. Thanks. Phil