I'm replacing a set of ~40 yr old white pine barn doors; the bottom foot or so has softened/rotted out. Using woods other than white pine is not a option. I'm wondering if i can improve rot resistance by coating doors with CPES (Clear Penetrating Epoxy Sealant). Original doors were unfinished except for maybe a couple coats of Thompson's waterseal a long time ago. I'm not looking for miracles, but would CPES have a noticeable effect on lifetime/rot resistance? The doors would not have a finish other than the sealant; I'm thinking of three coats, but can apply more if there's a benefit.