While I have no experiene withe these stocks it really should not be a big deal to seal them so that no salts could leech through to the metal parts..........provided that the damage had not already been done & the barrel/ action were not already rusted beyond repair. A thin layes of bedding compound through the barrel channel & back of action would seal teh wood there. The magazine area could be sealed with some marine grade polyurethane. All contact points would then be covered.