Clear or dark wax adds protection and shine to piece of furniture painted with chalk paint. Dark wax adds protection and shine, but also darkens and changes the color of the paint. Either can be used alone, but to achieve a beautifully aged finish, use clear wax first and buff it. Then add a thin layer of dark wax over this. Laying it over the clear wax allows you to push it into decorative details or crevices in the wood that will bring out the details. If you use dark wax alone over chalk paint, it will look blotchy and you won't be able to get an even color across the painted surface. If you apply too much dark wax on a piece, it can easily be removed by applying some clear wax over it. Simply rub it off with the clear wax.