Thanks for the tip. I am always looking for ways to reduce the elbow grease factor and have never wanted to mess with On Off or the other acid based systems you referred to. I have found soft scrub w/Bleach combined with some good sun overhead does a good job on the non-skid. For the hull I have been using the Collinite wax prep stuff before a good waxing. I will definitely pick some up and give them a whirl next time.