Drywall
To patch a ceiling, you'll need a tool with a sharp blade. This is where the utility knife comes in handy. For removing drywall dust, a utility knife comes in handy. You should apply a thin coating of joint compound in order to close the crack. To conceal the tiny bump, apply a thin second layer of joint compound. Use a fine drywall-sandpaper to smoothen the repaired area.
Plasterers can work in both private practice and contracting companies. Some specialize in new construction while others deal with buildings that are already built. Some even have to create architectural details. Some may even be an insulation and drywall contractor. These trades can be crucial in finishing a building.