Great question! Technically you probably could use the dark wax over the all-in-one paint without using a clear wax or topcoat first (since all-in-one paints have a built in topcoat), but I personally prefer to put a coat of clear varathane polyurethane topcoat over the paint first before adding a glaze. It just helps slow down the glaze’s absorption and makes it easier to control. Then you can add 2-3 more coats of polyurethane over the top to seal in the glaze at the end. Here is a blog post that breaks down the details if your interested. Glaze VS Wax Over Chalk Paint