Case cleaning - citric acid powder. Use 2 tsp per quart of boiling water in a non metallic bowl. Throw in stained brass & stir. Soak awhile, not long, & rinse

Citric Acid Powder 8 oz. 100% Pure Food Grade, Kosher

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Citric acid

Citric Acid Powder Cleaning for Water Distillers

Case cleaning - citric acid powder. Use 2 tsp per quart of boiling

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Kate Naturals Citric Acid for Bath Bombs & Cleaning (8 oz) Natural, Non-GMO, Food Grade Citric Acid Powder for Cheese Making, Sour Sugar, Water

Cleaning brass with citric acid.