One of the more popular methods of getting plaster walls smooth for painting is to apply a skim coat, which involves putting a very thin coat of plaster on top of the existing plaster. This is widely considered to be the single best way of achieving a smooth finish on battered or damaged walls.

How do you smooth out textured plaster walls?

Where walls have inconsistent layers of texture, with high and low bumps, it is better to use a steel trowel beforehand to remove as much of the texture as possible. Homeowners can use RhinoLite or Plascon's Finishing Plaster, which allows them to apply a skim coat to a textured wall to give it that smooth finish.

Can you sand plaster walls smooth?

Plaster is a wall and ceiling covering material. It can be smooth, rough or textured. ... In order to sand a plaster wall, you will need to use coarse sandpaper on rough textured surfaces and finer grit sandpaper on smooth surfaces.