Not to advertise for someone else, but I saw one of these boats and the bottom looked bullet proof. It also looked heavy but not sure. The bottom was put on extreamly well and was attached with what appeared to be UHMW plastic with truck bed liner spray rubber.
Check out this video for ideas.... The boat in this video is the one that I saw and it looked like it could handle a war in the river. I think the spot in the video that you would be interested in would be around the 1 min. 50sec mark.
http://stealthcraftboats.com/index.php? ... Itemid=120http://www.stealthcraftboats.comHere a discription on found on their website.
"Our Stealthcraft boats are made for white water conditions. For a small upgrade you can get the U.H.M.W. bottom which is ground breaking, no fastener system that allows a very slick bottom on your boat that will take on extreme abused and punishment. We also use a strong truck bed liner in the floor of the boat and on the side chines to protect from wondering logs and rocks you may come up against on your river adventure".
They also say this about their boat bottoms.
"New Steath Bottoms
If you want to find out more about our high-tech bottom material for your boat, give us a call. The Stealth Bottom is a high tech no fastner system. We guarantee the bottom for 10 years. Whether you have a drift boat, jet sled, aluminum or fiberglass craft, call us or send us pics of your boat. If it is a custom size we can quote it. We are at least half as cheap as the hyde G4 bottom 1300 and our stuff can conform to any boat. Our Stealthcraft bottom is a much slicker material with benefits that our perform the compition in strength, steath and durability.
We've got together with the industry leaders in the ski and snow board business and have found out an excellent way to adhering this material to boats. This is the highest density material ever designed. You can barely get a razor edge to cut into it without breaking the razor. You won't believe how slick it is. We've talked to a couple of guides on the Pere Marquette River after launching at Green Cottage. The bottom was so slick it broke the rope letting it down the ramp and flew into the river".
I hope this help you get some Ideas,
Ted Gauthier