Underwater 3D Gameboard

After a while and a bunch of talk, here is the 3D gameboard my dad and I designed and created for my wife's underwater Dungeons and Dragons campaign. (3D combat gets pretty crazy)

The bottom is a larger wooden board followed by 3 levels of clear lexan above it. Each level is seperated by wooden dowels with enough room to fit hands in and move models around.
All the wood is stained blue. Each level was completely masked with tape, then I cut all the lines out of the mask leaving just the 1" squares left. I used a lighter blue spray paint (enamel, which sticks to surfaces better than normal spray paint) and gave it 4 light layers. To protect the paint, I used a satin clear varnish, but apparently the container lied and it ended up transluscent. The side with the lines painted on faces down and the lexan is thin enough that things still line up fine - this gives us a flat playing surface. (which means later it can be covered with overhead paper and drawn on with eraseable markers)
On one side of the dowels we used metal nuts with threaded outsides so they could be screwed into the wood. On the other side of each dowel is a metal bar that's a bolt on one side and a screw on the other. (no head) One end is screwed into the dowel, leaving the bolt end sticking out of the dowel, allowing everything to be bolted together. The very top is capped with small bolts to hold the final layer on.

Oh yeah, and the clear levels are bullet proof.