Easy Porcelain Renewal .If you have a porcelain kitchen sink, even though it's "clean," it's been beat up.Use it for the bathtub too.. Barkeepers Friend Liquid rubbed into the porcelain with a magic eraser
cleaning porcelain sinks or bathtubs (wet sink and then sprinkle with baking soda; dip sponge in small bowel w/hydrogen peroxide and scrub; let it set 15 minutes and then rinse; repeat; rinse completely and dry w/towel; option: wipe sink and faucet w/lemon oil, then wipe dry)
Use with a little water or vinegar to lift even the most stubborn stains. Unattractive grout, Mold and mildew stains, Burner pans and casserole dishes... Use a few tablespoons of cream of tartar with hot water or hydrogen peroxide and clean any aluminum pans which have discoloration or any rusty drains, pans, or stains. How about a porcelain sink, tub, commode? Rub the porcelain surfaces with cream of tartar and watch the stains disappear.