STAR BRITE's Instant Hull Cleaner is a powerful and user-friendly solution designed to restore the pristine look of your boat with minimal effort. Formulated with a naturally effective oxalic acid formula, this cleaner quickly and efficiently tackles the toughest stains, including rust, dried fish blood, and leaf stains, without the need for harsh chemicals. Its versatile formula works on a variety of surfaces, including fiberglass, plastic, and painted boat hulls, making it an essential tool for maintaining the aesthetic appeal of your vessel. For best results, apply the cleaner when the temperature is above 50°F, and follow up with a STAR BRITE Premium Marine Polish to enhance the shine and provide long-lasting protection against the elements.