I was using pink foam from Home Depot 1 inch thick 6inches wide by 2 ft long
I made several samples using 6 ounce cloth and epoxy covering both sides with just one heavy coat.
After drying a couple days the test piece was very ridged and stiff
I placed both ends on a block and slowly started putting presure in the middle , I finally got enough pressure in the middle that the foam collapsed leaving both sides of the cloth attached. Pretty strong layup.
Next I did another piece , I drilled holes on four inch center after coating on both sides with cloth and epoxy. I used the small wooden skewers like you use for cooking inserted them in the holes and cut them flush, the put some wood flour epoxy mix on them.
![Image](http://i203.photobucket.com/albums/aa195/txriverrat/nw6102.jpg)
After drying a couple days I tried to break it , put a ton of my weight on it , very little give ,finally took a 2+4 placed on edge between the pegs
put a lot of weight on it ,it finaly broke ,but it pulled the 6 ounce glass into before it did. You can see the foam is not deformed it snapped clean
![Image](http://i203.photobucket.com/albums/aa195/txriverrat/nw6104.jpg)
On the bottom side of the top piece you can see where it tore into ,I cut the other side with a knife. This piece was really strong,now if I had glass down the edges I dont think I could break it.
I then to a framing hammer and using the same force it would take to drive a 16 boxing nail hit the same spot 30 times .
![Image](http://i203.photobucket.com/albums/aa195/txriverrat/nw6102.jpg)
I did this between the right four pegs , can you even see it, I had to roll it up on edge to see any indention at all , the hammer was used flat just like you would drive a nail.
What I am doing with this method is tying both skins together so a hard blow is transferred not just on the outside but to both sides at once and the wood dowels make a truss. Also if you take a hard blow it keeps most of the impact and damage inside the square made by the dowel.
This would make a light tough pretty impact resistant boat
Ron