brass discoloring

[Whoneedsafety?]

Hello CGers, I tumbled some brass in walnut w/a splash of nufinish. After removing the primers I decided to tumble in RCBS corn cob w/polish powder. When I removed the brass it was covered in a black tar substance (felt like graphite). I removed the substance with steel wool. Now the brass is discolored with dark and copper colored spots. Any idea if the brass is safe to reload?

I hate the idea of scrapping it since it is LC match 30-06, 40s-60s era.

[the86d]

How long did you tumble for?

[rsrocket1]

Sounds like the zinc leeched out of the brass leaving just the copper behind. Your brass will probably be fine so long as you didn't tumble it for days on end. It just may look a little funny and maybe last a few less reloads.

1. If you are tumbling to remove the lube, just a quick run with untreated media is all you need. It would be similar to a quick wipe down with a rag dampened with mineral spirits or rubbing alcohol.

2. Never do a big batch of anything without experimenting with a sample.

[Whoneedsafety?]

2. Never do a big batch of anything without experimenting with a sample.

Thanks RS, these are words to live by-

[bohoki]

its old and worn scrap it