Apply primer onto the walls especially if applying to a glossy or satin finish. This will allow the joint compound a better base to adhere to. Allow one day for the primer to dry adequately before proceeding with the next step.
Apply the joint compound onto the walls using a wide putty knife and using inconsistent strokes in perpendicular and vertical directions. If the application becomes too smooth use your knife edge to make indentations and crevices in the joint compound. Tuscan style does not lend itself to even, smooth application.
Paint the walls a base color of beige or brown using your paint roller. Again, allow one day for the joint compound to dry before applying paint. Use your paintbrush to touch up any deep textured areas that you missed with the roller.
Mix the glaze with paint using a 1 to 5 ratio. Use a paint color that is darker than your base color. Orange glazes can be used with yellow tones whereas brown glazes need to be used with darker colors. Mix until you have an even consistency.
Apply the glaze and paint mixture using a paintbrush once the original paint coat has dried. Sponge most of the glaze off of the wall leaving only a small amount. The textured wall crevices will hold pockets of glaze bringing out the textured look of the wall.