Unsealed Sandstone is prone to etching marks if there is a wine spillover. We always recommend sealing the Sandstone tile so that it minimises damage from strains. In case of a wine spill, the best would be to clean it immediately to reduce the chances of the Sandstone tile getting stains. Immediate cleanup would lessen the chances of staining. However, if the stains are stubborn, use warm soapy water to get rid of them. Pat the area dries thereafter. Unsealed Sandstone is prone to etching marks if there is a wine spillover. We always recommend sealing the Sandstone tile. In case of a wine spill, the best would be to clean it immediately to reduce the chances of the Sandstone tile getting stains. Immediate cleanup would lessen the chances of staining. However, if the stains are stubborn, use warm soapy water to get rid of them. Pat the area dry thereafter.