Polished marble can be used for kitchen floor coverings, but it requires regular maintenance to prevent staining, etching, and scratching. Due to its high porosity, marble is prone to absorbing liquids and stains, so spills should be wiped up immediately. It is also susceptible to etching from acidic substances like vinegar, lemon juice, tomato sauce, and even some cleaning products. To protect the polished surface, it is recommended that a sealer be applied periodically. Additionally, it is important to avoid dragging or dropping heavy objects on the marble because it can scratch or chip the surface. Despite these potential drawbacks, many homeowners choose polished marble for the unique beauty and elegance it can bring to a kitchen.