I'm getting better every time. I found a container that works great. My wife was getting the Frozen Smoothies that ya just add juice to and shake from the grocery store. I had a stack of them for nuts,bolts, brass or whatever. They fit right in my tumbler so I gave them a try using black airsoft BBs and Smokes powder. Tumbled 3mins but the coating was kinda thick. Today I just tried shaking them by hand for 1 min. Worked great.