If your ceiling texture has been painted, you won't be able to scrape it clean. You may need to skim-coat the surface. Paint a textured surface the way you would new drywall. Let the “mud” dry ...

While you’re at it, get to know the difference between sheetrock and drywall. Popcorn ceilingIf you have a heavily textured ceiling and just ... tear-away bead, mud rings for junction boxes ...