I have been using a beeswax based furniture polish on all of my wooden stocked rifles. The water and snow seem to really bead off nicely. It never occurred to me that some wax in liquid form would work in the nooks and crannies to keep it dry. Thanks for the suggestion.Have any of you thought about dripping melted beeswax into the screw recesses after tightening the screws and wiping the surface clean on all the areas that you find water/condensation seeping its way into and causing the rust mentioned @Milan That should create a seal against any water incursion in those areas.
By the way, I saw a video of you making a leather knife sheath where you dipped the sheath in a wax. Great result I am sure, with the old techniques and materials sometimes being the best.