I have to deal with these stupid damn berries that fall on my new white vinyl tramp where I store my boat. They disintegrate into a dark purple staining dye if they get wet. Normal soap and water doesn't get the stain out of either the deck or the tramp, but theres this stuff called "Roll Off" that I got at Boater's World that really works wonders. Its super powerful, so much so that it started taking off my pinstripe along my hulls, so you may want to dilute it a bit. It gets the stains out of both the tramp and the deck no problem. You may want to check it out.