I used walnut shell with Nu-finish to clean up a couple thousand .30 M1 cases that had been submerged during Allison and sat for for years after drying. They had green and black on much of them. On the worst hulls some discoloration remained, but they were clean. The ones with just green came out shiny. I used the large Harbor Freight vibrator and HF Walnut Hulls.AndyC wrote:Although I've tumbled brass in various dry media for decades I'm no expert in what is best.
However, from what I have seen through researching others' use, these seemed to be the general norms:
1. Walnut shell/lizard bedding is most efficient at crud-removal and quickly results in clean yet non-sparkly brass (this is what I use).
2. Crushed corn-cob media (with a capful of an additive such as Nu Finish liquid car polish) seems to work on the finer polishing to get that more sparkly look but takes a lot longer to get heavy crud gone.
3. Some folks run their brass through walnut media first to get the crud off then drop the brass into corn-cob after to get the finer polish - others mix walnut and corn-cob media into the same bowl to do everything in one step.
Me, I'll be trying the latter - getting some corn-cob media and Nu Finish polish and putting that in with my walnut lizard bedding.
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