I am getting my Explorer ready for a 4-6 week long summer trip. I am going solo so there will be lots of boat dragging. Time for a keel strip. I have looked at factory-supplied keel strips on Nigel Dennis boats and they seem to have a slightly rubberised final coating, the same as the covering of the one inch strip between hull and deck. Any ideas as to its nature? It doesn't look or feel like ordinary gelcoat and doesn't scratch or flake as easily. Don at Comox Valley Kayaks reckons it is gelcoat but I am not convinced. Also, how many layers of fibreglass cloth do forum users apply for their keel strips? I'm thinking two. Thanks.