I enjoy mixing colors--keeps me happy
I usually start with Smoke's gloss black and add some additional color:
purple gives a dark cherry red
green and you get something close to OD (olive drab; uck--wore that color more than I ever wanted to
and so on.
I find that the black gets used up faster and the color changes as I tumble them
the cherry red gets more purple
OD gets greener
I'm been known to add mult colors to black and then it's anyone's guess what I end up with.
No matter, they all go out the barrel the same.