For the fastest cleaning and surface preparation, use this no-rinse 1-step formula to prepare your surfaces for repainting or refinishing. It is recommended to bond old enamel, oil-based, or latex paint, varnish, or lacquer finishes to new coatings, or before wallpapering. It removes grease, grime, food stains, crayon, dirt, smoke, old wallpaper paste, and wax from painted or unpainted wood, metal, or vinyl wallpaper. Do not use on porous or non-washable wallpaper. Always test first on an inconspicuous surface for compatibility on areas not to be refinished, as it will degloss most surfaces. Quart container of concentrate makes 5 quarts of cleaner.