Hello I was hoping someone could help me. We recently moved into a detached house of brick/block construction. Some of the walls internally have wave like cracks of plaster coming off the walls near the scrim cloth/ ceiling joints. They are not big 1 inch at the biggest one, but they are really unsightly!! Does anyone have any experience of this type of problem? I was thinking dig it out along the cracks not disturbing the scrim and fill with easi-fill and sand flat. Would this be the way to deal with it? Thank you