The wood for the cockpit coaming is a stock 5/8th-inch square by 8-foot piece of finished Douglas fir. I liked the fine grain in these pieces, so I bought three. A 5/8th-inch strip of the top outside of the cockpit was first wetted with epoxy, as was a stick of Douglas fir. I then mixed epoxy with wood flour (turns out this is pine wood flour) to make a good glue. This was applied to the "stick", which was then held in place along the top edge of the cockpit with clamps.

You can see how the coaming piece butts up against the strip of wood coming from the top of the cabin's side, which also was shaped to follow the contour of the cabin's side.

Any excess epoxy squeezed out from the clamping was scraped off with a nylon putty knife. If you look just below the third clamp, you can see a faint line in the rub rail showing where two pieces of the rail came together on the second layer.

The completed portside cockpit coaming. The excess wood was trimmed off, and the top of the coaming was sanded flat. The starboard side was prepared in a similar manner. I also added a piece to the top outside edge of bulkhead 17, to maintain a continuous strip around the entire cockpit.