Prepare the walls for painting; apply the base coat and let dry. In separate containers, mix one part of each top coat color with one part water and one part latex glaze.
To create this wet-on-wet technique (i.e. working on a wet surface), dampen a comfortable-sized area of the wall with the damp cheesecloth, and add a squiggle of the desired paint mixture. Use the damp (not wet) sheepskin and rounded movements to move the paint around, keeping the edges thinly fanned. This creates the soft look.
Use a dry brush to gently disperse the paint in darker areas, working until you can't see any brush lines. Repeat until the entire project is done. Feel free to colorwash with more than one color, but keep them in the same tonality (the two featured colors work well together).
Make sure the wall is completely dry before tackling touchups. Lap lines happen when you work too closely to an already painted area. To fix them, dilute eight parts of the base coat paint with one part water. Lightly brush the mixture across the lap lines, and then diffuse the color throughout the area with a dry brush. Let dry.