Well, I don't get so anal with my brass that it just has to look new every time I reload or shoot it. Unless you have lots to spare IMHO it's a waste of time.
I do however like it to be CLEAN.
If I only have a couple of hundred rounds of rifle brass it goes into a SS Pin Tumble with Lemshine from Canadian Tire. It has a mild acid in it that gets rid of the grease. The soap and pins get rid of the carbon, inside and out. Stains stat in place but seeing as they are purely cosmetic, I don't bother with them.
If I have a large batch of rifle/pistol brass, it goes into an old pillow case and into the clothes washing machine with Lemshine. I knot the bags very tightly so they usually need to be cut open when I dump the cases out to dry, into a couple of old cake pans. Then they go into the oven to be dried at 250F for about and hour. This works well for me.