I recently acquired a 2000 Hunter 410. The boat had a rub rail with the gray rubber which had been painted and was wearing off. I replaced it with a white rub rail that looks newer which had to be heated to conform to the bends in the hull. I have now noticed that less than 6 inches in the middle of the stern actually is under water. Being in the water, enables the slime algae, dirt, etc. to adhere to the rub rail that is under water. Does anyone know about this?