And what is the chemical treatment you do to it that gives it that deep red finish?
Experiment with a small piece for appearance testing. The epoxy will do a wonderful job of sealing/waterproofing the wood. The varnish will give it shine, depth, and lustre as well as protect it from UV damage. Regular spar varnish, not polyurethane varnish-it breaks down quickly under UV light and flakes off.