I started using Perma Blue years ago, I am continually impressed at how well it works. I've used it to touch up small parts on all sorts of modern and vintage guns. Recently I bought a lever action rifle with a blued site that was showing signs of surface rust. I cleaned the rust off, spent about 10 minutes with a Q Tip applying Perma Blue and now the thing looks like new. I've used it on many other parts as well, including AR trigger parts.
If you dont have some in the gun cleaning kit I'd suggest getting some. I think you will be impressed at how well it works and how many applications you will have for it.
Bob



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