I don't think Rain-X would be a very good idea. I am not sure exactly what it's made of, but can't imagine that it would be very good for wood or bluing. CLP (Cleaner, Lubricant and Protectant) hasn't failed me yet for the metal parts of the gun. I think you can get that stuff at Wal-Mart now. A good wipe down of the wood parts when you get back to camp should do the trick for the wood.