I have owned my 2007 320EC since new, each year I buff and polish the black hull sides until it looks new but I've noticed it is taking less time each year for the glossy shine to fade and oxidize. This year was the worse, losing it's shine in about a month, not all over but those that are in direct sunlight, I used 3M Scotchgard Liquid Marine Wax. In the past, I've used many products, Collenite Fleetwax seemed to last the longest but it too did not last a full season, plus it's a PITA to apply. I've done some research on Acrylic Sealants, Vertglas in particular, and wonder if this is the key to a longer lasting shine. Like I said, I can get a shine, but protecting it seems to be very difficult, also, why does the shine I do get not last as long as it used to? has anyone used Acrylic sealants and does they really work as well as advertised?