How To Smooth Textured Plaster Walls. Use a 12 inch long plaster trowel, or if you perfer, use a 12 or 14 inch drywall knife. If your wall is already plastered, for example, you’ve recently removed an old wallpaper or you’ve moved into a new house to find bumpy plastering, you will have to sand the wall.
Other methods require other trades and increased cost, etc. If warm water removed most of the texture, a light sanding will likely smooth the wall surface. This handy, inexpensive tool attaches to your drill and within seconds you have very smooth mud to make your project much easier (it essentially keeps the mud evenly moist and creamy).
Turns out, the others were right with not doing this, because it didn’t help much!
The same technique gets rid of textured walls. Repeat the process as many times as required to reach the desired smoothness. Use a 12 inch long plaster trowel, or if you perfer, use a 12 or 14 inch drywall knife.
Use a brush to rub the solution into the gaps and clean the wall completely.
It can be smooth, rough or textured. If your wall is already plastered, for example, you’ve recently removed an old wallpaper or you’ve moved into a new house to find bumpy plastering, you will have to sand the wall. Gently sand the surface of the wall with sandpaper.
Level the walls with drywall compound if the texture is too deep for complete removal.
Now you are ready to clean textured plaster walls. Cover it up with a disguise such as wainscoting like board and batten, wallpaper, or modern textured wall panels. A skim coat refers to the application of a layer of finishing plaster to smooth textured walls or cover up imperfections.
Wet and scrape to remove the wall texture.
Especially bumpy walls may need more than one coat. Fill a pump sprayer with water and spray the entire wall evenly to soften the texture. Gently sand the surface of the wall with sandpaper.
When the whole surface is covered, allow to dry until firm to the touch.
If warm water removed most of the texture, a light sanding will likely smooth the wall surface. You may have a textured finish on a wall or ceiling in your home that resembles mesa and butte topography you may see on a grand scale if you travel to the magnificent southwest part of the usa. Apply an even coat with firm, sweeping strokes.