Poor mans tumbling machine.

[Portable Welder]

I have a bunch of small parts that need deburring so I come up with the idea of using 60/40 gravel that I use for mixing cement and my cement mixer.

I wont claim that its fast but its slowly working.

I have 200 pcs. of 3/16" x 2" flat bar that I'm doing.

[tackit]

Throw a bag or two of black beauty in it.

[wroughtnharv]

It also works for removing scale after forging, old blacksmith's trick.

[Portable Welder]

Wroughtn harv, You just had to go and burst my bubble, I thought that I was the only one to ever think of that.