Add more cloth layers and epoxy if desired. The following notes are copied from newsgroup or website postings by other people. Preferred for use on bare wood, or small fiberglass surface repair and mounting jobs. Today, in most wooden boat shops, epoxy resin systems are the main resin systems used in the construction and repair of small and large wooden boats. Polyester resins have little application in the construction methods used today by modern wooden boat builders and restorers.
Epoxy systems offer superior adhesion, toughness, resiliency, and moisture resistance.
When engineered properly, an epoxy fiberglassed or coated wood surface will last. It is unlikely to crack, split, or delaminate. Epoxy soaks into wood fibers a bit. Use epoxy to protect wood cores. Used in fiberglass work.