Forget the hemp Max. It's legally grown here in Canada and other than providing the material for ugly t-shirts for the granola crowd and fuzzy green notepads the producers here can't get rid of it. Think of it this way, would you lay up a mold with shredded newspaper and epoxy? It likely would be just as strong as well as thick and heavy. The beauty of hemp lies in the plant's ability to produce massive amounts of fiber, quickly and without much work. Plant it and harvest it! The redwood sounds great. Good luck with that.