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Cleaning Porphyry & Slate

Dust with a soft-bristled brush, then wash with warm, soapy water and a cloth. If this doesn’t work, add up to half a cupful of ammonia to every 4.5 litres of water needed to remove all the dirt. Rinse afterwards...

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20th January 1996

Cleaning Scagliola

This material is an imitation marble made of gypsum, glue and splinters of real marble or granite. Dust with a soft-bristled brush, then wash with warm, soapy water and a cloth. If this doesn’t work, add up to half...

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20th January 1996

Cleaning Stained Glass

Old and valuable stained glass that has deteriorated badly (usually from long exposure to pollution) should be entrusted to a professional restorer. Gently clean lesser pieces with a soft-bristled scrubbing brush...

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20th January 1996

Cleaning Stoneware (general)

Because most stoneware is porous, it is important to dust it regularly with a soft brush to prevent dirt from penetrating the surface. In addition to this, you should, from time...

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20th January 1996

Cleaning Stoneware with Friable, Flaking and Powdery Surfaces

If they are friable, limestone and sandstone must be consolidated after cleaning. Brush on a solution of one part clear acrylic matt medium to ten parts distilled water, or apply a stone sealer. To consolidate stones such as basalt and marble, warm them slightly in front...

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20th January 1996

Cleaning Suede

Take large suede items to a professional cleaner. Clean smaller suede items as follows: Remove any dust that has built up in the pile of the suede by gently brushing with a brass-wire brush. Spray on an aerosol...

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20th January 1996