Wooden decks can develop stains from mold, mildew, tannin, rust or just food. You can be in trouble if these spots black wooden deck as the black spots are usually more difficult to remove in bright areas. Or, if your deck has black tables, cleaning can be difficult without clear wood. Black spots tannin, Removes deck stain colors with a mild solution of detergent and water. Or, use a wood cleaner with oxalic acid to remove these marks, but be careful, as this product can lighten the wood.
Black mold stains, the black mold tends to form on the wood that often stays wet by rainfall, sprinkler or wet weather can deck stain colors. You can avoid painting the wooden cover with mildew resistant sealant. Removes black mold stains with a mild detergent solution or use one part bleach and 10 parts water. Rub the solution until stains disappear and rinse the area completely. The iron stains develop on deck stain colors and often black surface. You can avoid these spots by installing a water softener that removes iron or through a treatment in water before using it to clean your deck. Remove iron stains with oxalic acid or other wood bleach.