I am in the process of building a Ziroli B-25 and a Don Smith B-17. All of my building experience is covering with Monokote. I have never covered with fiberglass. I would like to hear as many opinions as possible of the techniques of glassing using epoxy verses using polyurethane. I have read only one article using epoxy and one article using polyurethane. I am still not sure which way to go. So I would greatly appreciate any comments.