Cup rings and etchings in marble caused by clear cosmetics, soaps or any acidic substance or spray can be addressed with special polishing powders and solutions that may be mechanically applied. Mildly abrasive solutions and pads that often remove the marks without dulling the stone’s finish are also available. Stains that have penetrated the stone can often be “drawn out” of the stone with a poultice – a specially designed paste that is used to pull the foreign substance out of the stone over an extended period of time.