From What I know about boat building and my limited use of epoxy in knifemaking, the trick, other than vacuum bagging like people have mentioned (if it can get rsin to "wet out" and totally penetrate mahoghany and brunzeel plywood, then construction paper should not be a problem), it picking the right resin for the job. Epoxy is generally alway going to be stronger than polyester or vinylester, BUT it may not be right for your application. Also there are a goodly number of epoxy resins and also filler products for different applications. You should take a look at the West System instruction manual. it gives you a good idea of what each product is best for. From what I understand about the phenolic resin used to make real Micarta, you have to apply heat and pressure to cure it properly which you don't have to do with epoxy.