Hope you may provide an answer: I've been using a hi-speed Thumler's Tumbler with 1 tablespoon of Dawn + 2 tablespoons of Armor-All Wash & Wax + 1/2 teaspoon Lem-N-Shine and a short half-gallon of Wal*Mart's distilled water to tumble clean 101 military .30-'06 deprimed cases, with my timer set at four hours.
I always have gotten to my tumbler within a quarter-hour or so of completion, when I add/rinse about three gallons of tap water to tumbler. I then put the now-sparking brass on trays in a Fulton brass dryer, with that timer set for an hour, after which I put 50-each in two bags. I'm happy.
HOWEVER -- with the ambient air temperature in my garage hovering at 100+ degrees yesterday afternoon, I just left the then-tumbled batch in the tumber, reckoning it would be cooler out and I'd "process them" (put in dryer) this morning. After a bit of garden work (7AM) I got the Tumbler out, and noted 16 of the 101 cases had really gross staining on them: a bluish color, some for roughly 3/8" from base; others in a case side; and a couple where the tip was stained. Perhaps another 20 to 25 just didn't look sparkly clean.
I ended up making a new cleaning solution after rinsing these -- timer will time out in another 3 1/2 hours... AND, here's my questions:
1/ Have you ever experienced similar?
2/ Is the staining from the brass sitting in the dirty solution for about 18 hours?
3/ I'm hoping when this 2nd cleaning ends, the brass will be as I hoped, and, the several thousand cases in previous sessions; regardless, any "light" you may provide re this surely will be appreciated!
Thanks!
geo