I recently acquired some really nasty stains on my hulls while lake sailing. I tried "Star Brite" hull cleaner, wax, and even Simple Green cleaner, they didn't even come close to doing the job... Someone told me to try Comet cleaner. Is that safe for the finish? I don't race yet, so I was going to finish off with a good coat of wax... Has anyone tried the Teflon hull finish? Would that cut down on my hull stains?