How to Apply Venetian Plaster Over Existing Wallpaper
You can use Venetian plaster to disguise the wallpaper pasted on your walls. This will mean that you don’t have to take the tiresome process of removing the wallpaper which generally damages the wall. A thin application of Venetian plaster creates a new look for the room. You can do this yourself by following the 12 steps described below in the article.
Step 1 – Glue the Wallpaper
Make sure that the wallpaper is properly glued to the wall at all points. Apply glue at all the loose points and let it dry before you proceed.
Step 2 – Apply Joint Compound
Use a small putty knife to apply joint compound at all seams. To fill the ridges at the points where two wallpaper sheets meet, apply very thin coats of plaster and let it dry up.
Step 3 – Sand the Plaster
Use a fine grit sanding sponge to sand plaster. Wipe-off the dust using a towel. Keep repeating the previous and this step till you have completely disguised all the seams.
Step 4 – Tape-off the Walls
Use the one-inch painter’s tape to tape-off the walls, ceiling and baseboards. Remove as much furniture from the room as possible and cover the remaining items and the flooring surfaces with plastic sheets.
Step 5 – Apply Bonding Primer
Apply bonding primer to the walls. The color doesn’t matter as it will ultimately get covered by the plaster. To roll the primer onto walls use a short-haired roller. Let the primer to dry for around 24 hours.
Step 6 – Using the Trowel
Use a metal trowel to apply the Venetian plaster. It is advised that you use a trowel that has beveled corners so that nicks and dings are not formed in the plaster. While apply the plaster hold the trowel at a small angle.
Step 7 – Multi-toned Look
If you want a multi-toned look, then you will need to use multiple colors. The first layer of the plaster should not be more than ¼ inch thick. Allow the plaster to dry for around 4 hours.
Step 8 – Sand the Plaster
Sand the plaster in the similar way as in Step 3. Now place a very small amount of plaster on the trowel for the second coat.
Step 9 – Apply Further Coats
Skim the plaster surface and fill all the small gaps or holes present in the first layer. Allow it to dry and then check the coat to decide if additional coat is required or not. Don’t forget to use sand between the coats.
Step 10 – Apply Topcoat Layer
To increase moisture protection and to get a satin sheen, apply a layer of topcoat. Use Venetian Plaster Topcoat and the trowel to get a light, even coat.
Step 11 – Examine the Wall
To check the evenness and uniformity of the topcoat examine the wall at a very close angle else you might miss defects in the transparent topcoat.
Step 12 – Let it Dry
Let the walls dry for 24 hours and then do the final inspection to check if all the areas are covered and that the surface is not uneven.