- Ensure you spread the plaster in a single thin layer across the surface using long and short random strokes.
- Allow the plaster to dry for a couple of hours before applying the second coat.
- Smooth out any edge marks or high spots with the trowel.
- The plaster must be allowed to dry for 24 hours before topcoating or burnishing.
The Venetian plaster topcoat is used for a washable and satin-sheen finish in high traffic or excessive moisture areas. A clean and flexible 4" or large trowel is used to spread the topcoat across the surface holding it at an angle of 60-90 degrees.
The technique to be employed is long and short overlapping strokes forming a thin layer to avoid puddling in the recessed areas. Allow the topcoat to dry throughly.
- Burnishing the surface should be ideally done within 7 days of application.
- Using 400 or 600 grit sandpaper, rub the surface in a circular motion till the desired look is obtained. For large areas, use a power sander.
- Wipe the burnished surface with a dampened rag to get rid of any plaster dust.
- Use the flat side of a clean trowel for a better polished look. Heat and friction caused due to rubbing creates a defined and glossy appearance.
Applying Venetian plaster
- The most important and often overlooked step is to ensure that the substrate is smooth, flat and level.
- Ensure you tape off any trim or adjoining walls not receiving the plaster.
- Prime the wall with an oil based primer.
- Some Venetian plasters have to specify an alternative liquid brush-on or roller applied base coat.
- The base coat will have to have a coarse or sanded tooth for the plaster to stick to.
- Dry and sand lightly with 100 grit paper and block to knock down any unruly areas.
Venetian finish coat
- Initially, apply a coat of plaster using a trowel using short random strokes. The edges must not be left dry.
- Allow the first coat of Venetian finish dry 70% before applying the next layer.
- Employing the random stoke method apply the second coat of Venetian plaster having a wet edge.
- Apply the third thin finish coat of material while the second layer is still wet.
- To have a scratch free finish, polish the trowel blades with 800 and 1000 grit sandpaper. This is also necessary for new factory polished blades.