Wood stains resist weather and are highly flexible. These wood stains provide better protection for exterior surfaces than varnishes. They are most suited for exterior surfaces, where their flexibility and weather resistance protect the wood from losing its natural appearance. Whereas you can varnish over the stain, you need to match the wood stain with the type of finish that you want to use on your wood. Oil-based stains must be used with oil-based polyurethane varnishes, while water-based stains can only be used with polycrylic varnishes, which are also water-based. Find a wide range of shades and sheen levels only at Superior Hardware Supplies.