Stain treatment highlights the wood's natural structures and adds contrast. You can either enhance the wood's natural color or go in a more radical direction, e.g. by using a mahogany stain on pine and thereby creating unique expressions. Stained surfaces can be finished with varnish, oil or wax. Stain is available in powder form, which is mixed into either alcohol or water, or as a ready-mixed product with water, alcohol or oil. The ready-mixed stains are easiest to work with if you want uniform surfaces.