Decomposed siliceous limestone used as a powder or paste for polishing metals.
- For a glassy finish, use pumice or rottenstone (decomposed limestone).
- For older stains use a paste of rottenstone, baking soda or cigarette ashes mixed with mineral oil, linseed oil, or lemon oil.
- For the final touch, rub down the table using a thin paste of rottenstone.
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