What boater doesn't like sunshine and water? Can there be too much of such good things? The final answer is yes, and especially so when it comes to keeping a boat in tiptop shape. Overexposure to sunshine fades hulls, and waterlogged storage compartments and upholstery harbor mildew and mold. Problem is, you can't avoid the elements — they're the boating environment. But, as we found out from three astute owners, the banes of boats can be prevented, and they have the investments to prove it.