+1 on Lemishine. The really dark portions of brass look coppery when done, but that comes
off in a very quick tumble to polish.
Tried the Goo Gone on the asphalt neck sealant residue in .30-06 Match pulled down brass.
Not good. Softened it some what but even with a stainless .30 cal bore brush it didn't all
come out. Plus the cases are so darned slick that they are almost impossible to handle. I used
about 50-50 Goo Gone and water. Cleaned the cases nicely tho.
Put about 100 cases in a polypropylene disposable kitchen storage container
and covered with gasoline, sealed the lid overnight. Removed the brass one an a time (outside!)
and poured the gas back into the container. As I removed each one, did a quick twisting in
and out with the SS brush in the neck. Perfectly clean. Let them air outside for a day and
will lemishine briefly and then tumble. Should be good to deprime at that point. Primers
were killed after the company pulled the bullets and (probably) salvaged the powder.
Goo gone is MUCH nicer smelling and on the skin that gasoline, but just didn't cut the old
dried up asphalt.
Bill