Ok, that is the first time I think I have ever heard someone describe using fiberglass as dangerous or expensive.. It is both cheap and safe.. Never seen someone repair a boat, or form a motorcycle seat pan with it? Both the actual fiberglass cloth, and the resin/hardener are cheap.. Just make sure ...

Has anyone tried wrapping their cannons with fiberglss? It would seem that it would add a lot of strength, as well as help protect it if dropped in the case of pvc..