Surface Preparation – The surface should be free of imperfections, sealed with a primer-sealer and have a low sheen. If it is not, fill cracks and nail holes, then seal with a primer-sealer. We recommend Zinsser’s Bullseye® WATER-BASE. (Hint: Tint the primer-sealer to a color similar to the color chosen for the Venetian Plaster).
Basic Tone on Tone Application
Step 1 – Skim Coat: Apply a skim coat of Venetian Plaster with a Modern Masters Japanese Trowel at a low trowel angle (2 finger space) and scrape off excess at a high trowel angle (3 to 4 finger space). Let dry 1 hour.
Step 2 – Texture Coat: Apply a texture coat of Venetian Plaster with a low trowel angle and light pressure using a skip trowel technique. This technique will produce peaks that should be “knocked down” by smoothing lightly with a low trowel angle. Let dry for 1-2 hours.
Step 3 – Skim Coat: Repeat the process done in step one and let dry for 1 hour
Burnish/Polish - For a marble-like finish, sand the dry Venetian Plaster in a circular motion with 400 grit dry sandpaper (a palm sander can be used). For a higher sheen, dust off with a soft rag and sand with 600 grit dry sandpaper. Dust off with a damp soft rag. To get a very high sheen, after sanding, rub vigorously with the flat side of a clean putty knife.
Dry Times – Dry time is approximately 2-4 hours. Dry time depends on thickness of application, temperature and humidity. (Drying times were recorded at 70°F and 50%RH): Note: Lower temperature and/or higher humidity will lengthen the dry and cure times.
Protection – After being polished, the Venetian Plaster should be treated with care. It is not scrubbable or water resistant, but it is easily repaired. To provide extra protection in bathrooms or high traffic areas, apply Modern Masters Venetian Plaster Clear Topcoat (VP300).Other protective topcoats cannot be used to protect the Venetian Plaster.
Coverage – One gallon/3.78 liters will cover approximately 150 to 200 square feet/13.5 to 18 square meters.