Experience the power of Sudbury HULL CLEANER & STAIN REMOVER 946ml, a potent solution that effortlessly eliminates deep stains, rust, and growth from fibreglass and aluminium surfaces. With its Oxalic Acid formula, this product penetrates and cleans without the need for scrubbing. Rest assured, it is both strong and effective while remaining safe for use. Discover the magic of this 100% biodegradable cleaner today.