WOW - You really got the propeller spinning on top of my thinking cap. And boy do I love the web! Did a yahoo search on kevlar fabrics and found a mother lode.
I can see it now, my squished Nash Rambler of a hot rod banana boat floating down the Skagit to the oohs and awes of fellow steelheaders.
This is definitely gonna be a winter project for one of the boats.