scattershot
Member
I always tumble my brass in a ground walnut hull medium, to which I add a small amount of automotive polish. Works well, but is messy. Has anyone tried aluminum oxide polish (powder) to their tumbling media?
Aluminum oxide?
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I simply use a commercial product made for the purpose and don't worry about it. Works fine too.
Paul in Nevada
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I just use an off the shelf brass polish made by a reloading accessories company. No need to play mad scientist when there are dozens of products already made for this purpose.
I would think alum. oxide is an abrasive powder that I wouldn't want to be transferred to my dies or guns. If you want more cleaning power try a handful of these in with your dry media; 5.20 lb. Rust-Cutting Resin Abrasive Tumbler Media
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scooter123
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I use Stainless Steel Pins, nothing works better than this.
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scattershot
Member
Thanks for the comments, guys. I have used commercial products, too, and find them satisfactory for the most part, but I just like to experiment.
STORMINORMAN
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Use Dillon’s blue brass polish. Add a cap full to the tumble media. Works pretty well…..
Aluminum Oxide is what the 'grit' is on the most commonly sold polishing paper and grinding belts used for metal polishing.
Grit sizes run from <course #40 to into #1500 and above right off the shelf.
It's the common grit used in valve grinding/laping compound for years.
It does have a tendency to imbed itself in softer metal like brass, copper, aluminum. For that it is taken advantage of in lapping out dimensions.
I'd personally stay away from it to avoid it getting imbedded into brass cases. That then scratching the reloading dies when sizing.
Grit sizes run from <course #40 to into #1500 and above right off the shelf.
It's the common grit used in valve grinding/laping compound for years.
It does have a tendency to imbed itself in softer metal like brass, copper, aluminum. For that it is taken advantage of in lapping out dimensions.
I'd personally stay away from it to avoid it getting imbedded into brass cases. That then scratching the reloading dies when sizing.
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scattershot
Member
Hadn’t thought of that. Thanks for the heads up.
