Paint a base coat on your furniture with acrylic emulsion paint. For a gray wash, try using a dull blue color, which complements the wash. Allow it to dry completely.
Mix your glaze and gray emulsion paint according to the instructions on the container. This varies depending on the glaze you are using.
Paint the furniture in broad strokes with a large, soft brush. As you go, gently wipe down the furniture with a cheesecloth to distress the wet gray mixture, exposing the blue underneath. You can also experiment with dipping a rag in your gray mixture, wringing it out and pressing it against the furniture to create staggered and uneven splotches of color.
Allow your furniture to dry completely before using it.