ZAR Interior Oil Base Stain (Formerly Black Onyx) wipes on as easily as furniture polish to stain and seal in one quick, easy application. Formulated with "controlled penetration," to help ensure a uniform color tone without unsightly streaks or lap marks, it can be used on previously painted or varnished surfaces, without stripping, to achieve a gorgeous wood grain effect. ZAR Interior Oil Base Stain can also be used for decorative faux finishing and color toning on non-porous, non-wood surfaces.