Now prep the cores by lightly sanding any ridges flat and removing any melted foam bits. Just try your best to make the surface smooth without distorting the shape. No big deal here, just take your time with 150 grit paper. Towards the aft sections of the cores there might be slight ridges, there is a lot of taper to these cores and that is to be expected.

Prep the sheeting by lightly block sanding the sheeting flat, you just want to level the wood across the seems, mostly on the outside, I usually run the side that I taped to the outside as it may be flatter across the seem and cleaner. I run the side I glued against the core. Next take a can of hair spray, I use the cheap 99 cent White Rain brand. Spray the side of the sheeting you are gluing, do a solid coat maybe even two coats. When dry your ready to spread the laminating glue.

I use West Systems epoxy to laminate the sheeting to the cores, Mike talks about using elmer's ultimate polyurethane glue for the sheeting in his electric thread. I haven't used the polyurethane glue yet, it may have an advantage as you can spread it a bit thinner and it expands as it cures.

What I did here was to mix a 18 gram batch for the turtle deck and a 22 gram batch for the lower belly sheeting. Using a business card spread out a thin layer across the sheeting. Leaving a slight thicker bead around the edges. If your sheeting is stiff, you can do the water/ammonia trick on the outside surface of the wood to make it more flexible. Slide the sheeting wood into the shuck and position the core with the inner chuck into the outer shuck. At this point you need to make sure you have full contact around all the edges and that the shucks are tight around the crowns. Using weights, poster board, large levels etc. just position things so there are no gaps.

The large 48" belly can be a beast, I made a jig out of particle board that holds the shucks together tight, these photo's show my methods, experiment with what you have on hand. Using slow set epoxy helps give you the time to make adjustments if needed. I've got 150 lbs on that belly core, it came out nice and true. And the edges where sealed and attached well.

What is cool about building these planes is there are many methods, lots of different ways to do the same thing.