Craig19,
I've been using it in anything with freckling. Because the Mother's, or Flitz, or Simichrome, has such a fine abrasive in it, I've polished away the rust without taking off the blueing. You'll still have gaps from the freckling, but it won't be rust you're looking at. Some use a copper penny and oil, I think, and some use oil and brass-or aluminum-steel wool, in like 4-ought super-fine. You might want to do a search for
methods first, and pick the one that sounds best. I'm just a shooter,
but I've used the polish on a 32DA fourth change, w/o messing up
the rest of the blueing. Hope this helps. (Don't know who started
that saying, but thanks.) TACC1