Definition of rottenstone in English:

rottenstone

noun

  • [mass noun] Decomposed siliceous limestone used as a powder or paste for polishing metals.

    • ‘For the final touch, rub down the table using a thin paste of rottenstone.’
    • ‘For older stains use a paste of rottenstone, baking soda or cigarette ashes mixed with mineral oil, linseed oil, or lemon oil.’
    • ‘Using rottenstone will produce the finest mirror-like finish.’
    • ‘For a glassy finish, use pumice or rottenstone (decomposed limestone).’
    • ‘Of course there's sanding between coats and a final rub out with pumice or rottenstone to give an even ‘dead’ surface.’

Pronunciation:

rottenstone

/ˈrɒt(ə)nstəʊn/