The Professor Eraser All Purpose Cleaner and Degreaseris a powerful all-in-one grime and grease remover that will keep your boat and trailer looking their absolute best. Safe for use on almost any surface**, The Professor Eraser All Purpose Cleaner & Degreaser tears through unsightly calcium build up and layered dirt on fiberglass, chrome, rubber, porcelain, metal, and even clothing (not recommended for fine fabrics). In addition, The Professor Eraser All Purpose Cleaner & Degreaser is able to remove those irritating black scuffmarks on your boat left by shoes and bow stop rollers. Give your boat that off-the-lot look with the non-corrosive, environmentally friendly formula of The Professor Eraser All Purpose Cleaner & Degreaser.