Tarnished brass?

[hunter63]

While cleaning out my MIL basement I came across a bunch of fired brass.
I know that my FIL bought factory ammo, fired them and saved everything.
I might even have fired some of them 25-30 years ago.

A lot of the cases were in very good shape, so other than being a dark color, the appear in good shape. Polished up just fine.

There are some, though, that have deeper marks that didn't come out after about 4 hours in the Lyman case polisher.

I sorta worked out the bad spots with "Scotch Brite" and put them back in, after pulling out the very nice cases.

Any rule of thumb on this?
Thoughts?

[Michael Kawalek]

HI Hunter
I gave up on tumbling years ago. Now what I do is soak the brass in water/vinegar/dishwashing soap for and hour or so and then rinse. To about a gallon of wash water I add one squirt of soap, about 1/2 cup of vinegar, and about a tablespoon of table salt (NaCl). Got this recipe out of gun digest a few years back.

After multiple rinses to remove all the bubbles, I leave the brass the dry in the sun before decapping.
Good luck,
Michael

[oneokie]

Originally Posted by hunter63

There are some, though, that have deeper marks that didn't come out after about 4 hours in the Lyman case polisher.

I sorta worked out the bad spots with "Scotch Brite" and put them back in, after pulling out the very nice cases.

Any rule of thumb on this?
Thoughts?

By deeper marks, do you mean pitting in the cases? If so, I would scrap those as the brass will be thinner and weaker. Case failure is not a good thing.

If any of the cases had green corrosion, those definitely should be scrapped.