Prepare the wood, brick or masonry surface before applying the whitewash. Remove dirt, debris and loose material from the surface with a stiff-bristle brush or scraper.
Wipe the surface with a damp rag to remove any remaining loosened material. Allow the surface to dry thoroughly before applying the whitewash.
Prepare the whitewash following the manufacturer's directions by adding water to achieve a thin whitewash solution. Choose a container such as a paint bucket in which to mix the whitewash.
Dip a large brush or roller into the whitewash solution. Avoid letting too much of the whitewash drain from the bristles when removing the brush from the container. Keep in mind that whitewash is much thinner than paint.
Apply the whitewash to the wood, brick or masonry using a smooth and slow motion to avoid splattering. Dip the brush, as needed, back into the bucket to load the bristles with whitewash. Allow the whitewash coat to dry and apply a second coat if desired.