I got mine, but haven't ridden it yet. I am in fear of the same thing with the topsheet. I may go the marine varnish route, but I really like the finish on it right now, so I got some butcher block conditioner and am in the process of putting a couple layers on it. it will not protect it from chipping, but it should help with potential standing water problems below the bindings. With the raw base, I fear of some rot over time if water stands in an area for a while.
i heard that too...a friend ahad a Flagship at kirkwood, and I believe one of the shop guys was talking about the same water penetrating under the top sheet...
2015/16 -17- Kirkwood days
Arbor A-Frame 158 2009-10
Jeremy Jones Hovercraft 156, 2011/12
Subaru WRX 06 - 181K