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As it is a natural material, changes in colour or cracks due to the level of humidity and sudden changes in temperature may be observed. If it does not receive any maintenance treatment with the periodic application of common and speci c oil-based protective products, the surface will weather into a silvery-grey nish that can be removed with light surface sanding and subsequent polishing with a hessian cloth. Small surface stains caused by oil or other foodstuffs must be removed immediately, before the wood absorbs them, by sanding the area concerned and polishing it with a hessian cloth. When the wood is wet for the rst time, it is normal for the surface to become slightly rough when it dries; the initial polished-effect can be restored with light surface sanding and subsequent polishing with a hessian cloth.
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