Star Brite Bird and Spider Stain RemoverDroppings from birds and spiders ruin the looks of any boat and can't be removed with just soap and water. But just spray on Star brite Spider & Bird Stain Remover and they'll begin to break down instantly. The non abrasive, non toxic formula won't harm fiberglass or painted surfaces and won't remove waxes or polish. Droppings dissolve without hard scrubbing.