20 oz Tub of Eelsnot to protect the hull and the waterline from growth, (i.e. algae, barnacles, zebra mussels, etc.) Just rub on hull and/or waterline just like applying wax, but no need to buff off. Eelsnot can also be applied UNDER WATER because it is Hydrophobic. Reach out for more details...
As you may remember, the downside to my choice is that it has to be applied every day; moreover, the skipper has to board his Sunfish immediately after launching.
When Rain-X™ is applied, your Sunfish will try to pop out of water and blow away!