Picking up from the gun deck decking photo above. Here it is being glued to a sheet of ordinary pink insulation sheet foam. I got lucky (again) and the sheet foam's thickness of 1" turned out to be the exact height I needed between the casemate floor and roof. I used white glue for this step as the foam will be coming out and I want that process to be as easy as possible.

Once that was done I flipped the assembly over, centered and aligned the sheet styrene for the top of the casemate, and glued that to the foam using white glue as well.

When the whole sandwich dried, then I shaped it. I started with a coarse rasp file, switched to a fine one, then did the final sanding with 150 grit sandpaper in a sanding block. The rasp made quick work of the foam, almost too quick at times. The foam sands and shapes very well, though.

All of the rough sanding done, most of the fine work as well. There are some gaps that I will fill with spackle before I sheet over the foam with more styrene for the casemate sides. Here's an overall shot; besides the pink color it's starting to look like a gunboat.

Here's a view of the stern, showing how well the foam blends to the curves. There's a little more work to be done to get it all lined up and right, but it's darn close.

I've also started thinking about what I'm going to put in the interior of this thing. Here's the five styrene tubes that will make up the boiler assembly.
