The board was constructed out of sheets of insulation foam and coated with Durham's water putty. I've since switched to a product called Flexcoat for this. Durham's becomes quite brittle once dry and I had a lot of problems with chipping. A friend of mine suggested Flexcoat and it works very well and does not suffer the brittleness issue. The board is 6' x 12' and I arrived at the size need by using the historical British battle line as a guide and scaling the board to the size needed for my British units to cover the same frontage.
The view from the Zulu Left Horn
A view of the overall battlefield
The Zulus Advance
The right horn vs. the thin red line
The end is near
The first Zulus approach the camp
This game ended up in a Zulu victory with the camp being totally overrun. The only saving grace for the British was that the colors were saved by a plucky young lieutenant at the last minute.