OK,
I'm about to delve into my first rust bluing project. I'd like to remove the old finish without mechanically (grit paper) doing it. There aren't any nicks, etc. that will need to be sanded/polished. I just want to replace the worn blue in the forend area. I've read about vinegar, naval jelly, etc., but what is safe for our old guns? Also, I assume that "touch up" rust bluing would be disastrous?

Thanks!

--Jay