What I use for coatings like this is WEST System(tm) epoxy with the Special Coating Hardener. It gives a great finish, has UV filters and since it has no volatile materials it stabilizes the wood completely as there are no micro passages from evaporating solvents. If used on exterior parts I put three coats of Epifanes varnish over it for additional protection. It has an additional advantage in that it makes softwood parts less susceptible to denting in handling, etc.
Tom |