Agreed that most people would never know it had been done, except for those types that hang out on a forum such as this one. So, realistically, probably no harm to the value. As far as telling by looking all one has to do is look in the cylinder and you could see the blue is gone. Probably wouldn't register with most people. The question still remains though if this might be inviting rust for anyone that doesn't take adequate care of their gun. I'm just weighing all the possibilities before I do it. Thanks for the replies.