[Pastor]

I use West epoxy for a sealing layer. I'm not sure how necessary it is but it does give a very durable finish that is easy to cut back to a smooth surface. Some dilute the stuff with acetone to help it flow into the pores of the wood and give an even more durable finish. To be honest of late for my own use I've not bothered with a top coating of the UV barrier because the sun don't shine up here much and the guns are always kept in the shade or indoors.

Top coats? International yacht varnish has done me well, if a little slow to cure