When rust has formed on your porcelain sink due to its age and inevitable wear, you can still remove the rust yourself and restore the surface of your sink to its original shine. There are some products available on the market today that can easily remove rust and stubborn marks on various surfaces. These products were specifically made in order to remove rust without damaging the surface of the porcelain. One such product is Barkeeper’s Friend Cleanser and Polish. It is a scouring powder that is strong enough to remove stains and scratches on the surface of porcelain and even stainless steel. Start by applying a small amount to your porcelain sink and gently scrub the surface, following the instructions stated on the bottle.