I made our flying bridge and transom nameboards out of the same teak plank when we bought the boat fourteen years ago. Other than an occasional new coat of Bristol they have not been touched since we installed them. Their maintenance-free longevity is due to the Sunbrella covers my wife made for them. The boat lives in the weather 24/7/365 but the covers do a terrific job of protecting the boards. We only remove them when we take the boat out. This is what the boards look like today.