The only issue with the epoxy is that it makes for a pretty "thick" finish that can leave your scales looking overly large. You might want to look into a product called Arm-R-Seal by General Finishes. It's an oil based sealer with urethane and it does a great job on wood. I use it on my scales and it leaves a shiny, waterproof and streak-free finish. You can get it from Woodcraft for $15 or so and have enough to last the rest of your scale making life!