Hi, I have a little old house (1921) in Bay Area (California), which means there has been alot of movement over the years (last earthquake was 2 wks ago), which I bought 2 years ago and it is sucking the money out of me and I need to do repairs myself. I want to retexture the ceiling in my front room, I recently took out an old wall heater and there are numerous notable repair areas. I know it is a plaster ceiling. It has flat paint and a bunch of prior bad repairs. I want to do a smooth ceiling but will do rolled texture if it doesn't come out. I am watching the youtube videos (yes, unfortunately, I am one of those DYI'ers). This project doesn't have to be perfect, but I want to do the best job I can. I have tiled a kitchen before (which came out at least liveable), so I at least know what joint compound is, and i really want to learn how to do this right. I was told that since the ceiling is plaster, I shouldn't sand it prior to putting on a skim coat. Any pointers (other than hiring someone, no money really here).