1 quart can. Tung Oil Varnish is a blend of tung oil and varnishes that penetrates the surface to produce a durable, hand-rubbed finish for fine furniture and wood products. More luster is created with each application. For use on: Use on any bare or stained interior wood surface where a natural wood look is desired. For long-lasting protection, simply wipe-on this premium Tung Oil Finish. How much to buy: One quart covers up to 50-100 sq. ft. (4.6-9.3 m2) depending upon wood porosity. Do not thin.