Ive sharpened some really nice stuff out of carbon fiber plate. It sand easily and keeps a sharp point. Clear coat and laquer it to avoid and carbon fiber splinters (which are very small and nasty)
Way stronger, sharper than plastic blades.
Epoxy bonds with Kevlar very nicely and turns Kevlar cloth into a very stiff, impact resistant shape. I have made quite a few racing sailboats with Kevlar and epoxy. The only downside of kevlar is you CANNOT sand it. Add a layer of fiberglass over the Kevlar if you want to sand and...