What happens next?

How to make venetian plaster
Wear a protective facemask to prevent inhaling the lime and marble dust.
Get a large plastic bucket or a wheelbarrow to use for making the venetian plaster.
Pour 2 quarts (1.89 liters) of lime putty into the bucket.

OPTIONS: --Stir the mixture well to ensure no blackheads or debris remains. Add the plaster and mix well to ensure that no air bubbles remain. --Mix the lime putty into the bucket with your hands. Install masking tape all around the bucket to prevent staining or other buildup. --Add 2 quarts (1.89 liters) of marble dust to the bucket and stir with a mixing rod or a wooden stick. You can get a wooden stick free at any paint store. --Mix vigorously, until everything is smooth. Lay the plaster on a scrap of paper.
Add 2 quarts (1.89 liters) of marble dust to the bucket and stir with a mixing rod or a wooden stick. You can get a wooden stick free at any paint store.