I going to create a gas bottle locker in stern of my wooden motor boat. The plan is to have a flat access cover matching the deck. The deck will be ply with Dougals Fir planking. What is the best way to create a water proof seal around the edge of the cover, so that it fits flush with the deck. It will need to
comply with BW safety scheme as boat will be moored on a river. The locker sides will be of Marine Ply covered with GRP and with suitable drain to outside.