Applied two coats of Collinite Paste Fleetwax this spring. Even after giving the entire deck and cabin top a complete wash down, we still get black streaks down the side of the hull . . . assuming it is coming from coal fired power plants.
We go over the hull with a soft bristle brush after we've sail - but by about mid-season the streaks need something stronger.
What product do you use clean your hull that won't remove the wax?