Anyone have issues removing trailer bunk carpet stains from hull? I've got a 2000 Moomba Outback with red sides and while hull. Moomba trailer has black carpet (new) on bunks (also new). Hull has black marks from carpet. I've cleaned entire hull with muriatic acid and water wash. Everything comes clean but the carpet spots. Any suggestions?

Also, boat sits on canopied hoist all summer. Hoist has vinyl covered foam guides which have left marks on red sides of hull. Is paint the only option? If so, where do I find paint? Any suggestions on application method?