My 1898 Krag rifle is still in fantastic working order after 110 years. I shoot it every other week, and it's still very accurate. My only fear is that, while there is no rust at all on it, the original bluing is about gone. This rifle is a family heirloom, and I do not intend on ever selling it. I want it to stay in good condition and remain functional. What would the cost be to get it reblued by a respected gun shop, and short of its dollar "value" going down, are there any other concern I should have rebluing an old rifle like that?