Since glitter mixed into opaque paint would lose its shine, if you want walls that shimmer with metallic bits, you'll need to use a glitter glaze topcoat. In addition to the glitz it adds, glitter glaze also provides a washable protective coating to the wall. Some glitter glazes may even be applied over wallpaper, adding shimmer to the design. Look for glitter glazes, also called glitter topcoats, at paint retailers and online.
Clean the wall thoroughly unless it has been freshly painted. Sponge a solution of 4 tablespoons of oxygen bleach and 1 gallon of warm tap water over the surface to remove any dirt, fingerprints and oils. Allow the wall to dry completely.
Stir the glitter glaze with a paint stirrer for 3 to 5 minutes, until it's evenly blended. Pour the glaze into a roller tray.
Coat a mini roller with glaze. Roll over the surface of the wall with even short strokes until it's covered. Allow the glaze to dry for two hours, or as directed.
Add a second coat of glitter glaze if you want to intensify the glitter effect. If you're glazing freshly painted walls, allow the paint to dry for at least 24 hours, or as recommended by the manufacturer, before applying the glaze.