One thing to consider if you glass the boat (and perhaps even if you don't)...round the corners of the bottom of the "boat" with a sanding block, router with round-over bit, or palm sander before you glass it. Then run the glass so it will follow the fuselage contour from sides to bottom and provide a continuous layer of glass around that junction of the sides and bottom. This will not affect aerodynamics in any measurable way, but should keep you from sanding through the glass layer when prepping for paint. If you sand through it, you could have a delamination if the plywood gets wet (from standing water inside).
How do I know this? Remind me to show you where the paint is peeling off at that junction on N891JF for exactly that reason. The interior floor was neither sealed in epoxy nor were there drainage holes in the corners, so water pooled there long enough to expand the plywood and break the paint line on that corner. I've epoxied the fuselage and drilled drain holes now, but the paint is hosed... -- Mark Langford ML at N56ML.com http://www.n56ml.com
