I thought I read somewhere that it was feasible to make kayaks out of fine papier-maché (of the type that was once used for making expensive furniture, not the stuff that we played with in kindergarten). Since traditional papier-maché takes on the properties of wood after it hardens (except you don't have to worry about it cracking or warping, since it doesn't react to changes in temperature or moisture), it would seem that this would be a workable material: it's cheap and lightweight, and when wet, it can be shaped (much like clay or mortar) around a mold to any desired thickness, and it gains the tensile strength of wood once it hardens. Am I on the right track here, or am I missing something?