Porcelain SinksKitchen and bath designer Angie Keyes' cleaning regimen for porcelain sinks is simple: She uses a Magic Eraser or a disinfecting bathroom cleaner like Comet, which comes in a nonabrasive, bleach-free liquid solution made for porcelain and ceramic surfaces. Lichlyter adds, "Tried and tested brands like American Standard and Kohler have porcelain surfaces that can handle all kinds of cleansers."For tough stains: Lichlyter recommends applying a bit of powder cleanser on the scuff marks and letting it sit for a few minutes before scrubbing the powder off with a scrub brush. Blogger Desireé swears by soft cleanser Bar Keepers Friend, which works without having to use bleach on the surface. "Apply a small amount [of Bar Keepers Friend] directly on the areas where you see stains. ... You'll see the stains disappear before your eyes." Stay away from: Bleach, which will eventually eat through the enamel seal on the porcelain.