OK, so your experiencing pressure building up in your barrel as it rolling? Here's a trick that seems to work pretty well. Add a couple antacid tables to each of the first two stages. I'm partial to Cherry Flavor myself lol.

 WHAT STONES YOU CAN POLISH Here's a simple and easy way to know. Its recommended that the stones you plan to polish in your rock tumbler to be harder than glass. A very easy test to confirm if your stones are indeed harder than glass is to lay a piece of glass on a flat surface. Then with firm (not excessive) pressure drag a point of the stone across the glass. A powdery streak will be made. Blow away the powder. If there is a scratch in the glass the powder was from the glass itself and your stones are good to go! Be sure sign up for our newsletter and to follow MJR Tumblers on Facebook for more...