This paper looks at the artificially induced surface conversion of calcium carbonate to the more durable calcium oxalate. Extensive research is being carried out on wall paintings and marble sculpture at the Opicificio delle Pietre Dure e Laboratori di Restauro in Florence. Encouraged by their work. I have researched the effectiveness of the conversion on English limestones. https://ashleyshomestores.shop/product-category/5-piece-outdoor-dining-set/