I got a 17' Seaswirl back in July and it was real clean outside and in. The only place I have to park it is in my driveway below an Oak tree. The leaves and acorns have taken over and they leave stains when it rains. Just got a cover for it and was wondering if anyone had any ideas or have removed oak stains from the gelcoat or fiberglass or what ever it is inside of a boat. It has a nonslip floor. I tried washing liquid and a brush and that won't do it. The guy I got the boat from had it parked in the sun. I don't have a place in my yard that doesn't have trees over it. Thanks for any help.<br />Jim