This technique is great for achieving a finished plaster wall's desired smoothness. A skim coat is a thin layer of plaster applied over an already-plastered surface. First, a PVA bonding is applied to the surface to stabilize and prepare it for the skim coat.
Plasterers also rely heavily on the finishing trowel. After the plaster has been applied to a wall, this tool helps to level it and smooth it out.
Using a sander to achieve a smooth finish on a wall is unnecessary. One technique is to use sandpaper wrapped around wood blocks to create a flat surface. Alternately, a fresh coat of paint can hide a multitude of flaws.
After the first two coats have been applied and the walls have been dry troweled, it is time to apply water with a brush and wet trowel the walls to smooth them out. Here's a rundown of one of the last steps and our recommendations for getting it right.