Rated 5 out of 5 by anonymous from castin’ craft resin. clear polyester. i used this as an experiment to see if it could handle weathering .. Epoxy-plus marine epoxy for coating, fiberglassing, stitch & glue – penetrates and seals wood against moisture with a tough, flexible, permanent coating. Epoxy resin. what is an epoxy resin and where should it be used? epoxy resins are powerful adhesives, which when properly formulated, soak into the wood, form a.