I strongly disagree! Epoxy resins are very good at protecting wood from water, and the boatbuilding community has very good paints and clear coats to protect the epoxy from UV.

http://www.toolbase.org/Best-Practices/Failure-Prevention/protecting-wood-from-humidity

"Molten paraffin wax and a sheathing grade, two-component epoxy
material with no solvent were the very best finishes found in
this study for controlling moisture vapor movement into
wood. The MEE is a direct function of the number of coats
of finish applied to the wood (film thickness) and the length
of time of exposure to a particular humidity"

www.fpl.fs.fed.us/documnts/fplrp/fplrp462.pdf

Three coats of epoxy will keep the water out.

Hi Don't even think about coating it with resin, it will peel off. Boat guys have a tried and true way to protect wood from the sun. Spar Varnish.
Fred

Hi,

I'm a sculptor making wood sculpture and want to protect it from the elements. Does anyone have any recommendations about which resin I should use?

Thanks

Rob