Each Michael Aram metal object undergoes a series of grinding, buffing and polishing techniques. Variations or 'imperfections' in the product's finish are characteristic of the creation process. Due to this handmade nature, no two pieces are ever exactly alike. Natural & Oxidized Brass, Marble Not dishwasher safe Hand wash with gentle detergent, dry immediately with soft cloth Avoid any detergent with lemon or other acidic agents Do not soak, even in plain water, or leave unwashed overnight Do not use abrasive cleaners, steel wool or scouring pads that can scratch and dull metal surfaces To reduce staining, use mineral oil to condition the surface