With the weekend too cold to snowboard, I'm finally getting to the cockpit finish work that shows. My design is a 1" solid bullnose with a 1/2" rabbet cut-out, to lay on and meet the 1/2" decking. The bullnose is 3/4" proud, all round the inside of the cockpit. A lot of fiddly work but I wanted the solid hefty edge and rounded inside corners, but for looks and function.
The Ipe tools surprisingly well. At first, you think it's hardness will be a problem. But in fact, it's more it's super density that slows down cutting, not hardness. Cutting edge tools like planes and chisels(if kept sharp), work very nicely in the tight, smooth grain. It saws and routs cleany with very little tear out and leaves a surprisingly clean edge requiring little sanding. Dust, even using a shop vac in conjunction with a saw dust blower(that exits outside), is fine and gets everywhere.
The bullnose, after epoxy, should be more than strong enough to jump on and take the abuse of feet bracing bodies to windward in nasty conditions. I've got a good foundation for my latches - 2 per lid - with ample fastening. With three hinges per lid, no condition I can foresee - by crew or nature - could rip these stout lids off.
Here's some detail of the inner band and bullnose, around the lids and cockpit. The inner band forms the drip edge around the lids that are centered in the drain channels, and really doesn't show except from below. The trim and decking will leave 1/8" clearance, all around the lids, same as the 1/8" caulk lines.