Cleans and de-glosses surface so paint adheres better. Use on all paints, varnish, lacquer and polyurethane or as a wall preparation prior to wallpapering. Removes dirt, grease, grime, smoke, mildew, food stains, heel marks, crayon, old wallpaper paste and wax from painted or unpainted wood, metal or vinyl wallpaper. Do not use on porous or non-washable wallpaper.