All Metal liquid polish is a non-toxic formulation. It is for all stainless objects including cooking vessels. The item should be free from food, dirt and dust. Add polish to a clean cloth, rub on the surface (follow directions) and watch it shine. If an item is used for cooking, it is essential you insist that the cookware be washed thoroughly for sanitary reasons. Water marks might need several treatments to remove. Stainless steel is an alloy of steel and other metals. Stainless may have a brushed look or a high mirror finish and our cloths work well on these items if used properly. A typical application is to clean stainless steel refrigerators, sinks, or cookware. It works well on ornaments and other stainless steel, too. What about stainless steel refrigerator doors? These doors are usually made of brushed steel but caution should be used. Aggressive rubbing on refrigerator doors will polish the brushed look and make it look a bit different. In some cases, the stainless steel may not be stainless steel, therefore the use of the polish will make the metal shine. There are instructions that come with the appliance and should be followed.