I love to do this every time I clean out the kitchen sink.
All you need is a Mister Clean Magic Eraser. Once you are done cleaning out your sink, take your magic eraser and scrub the sink until it is completely scrubbed. Rinse and that is all you need to do. You will see the results for yourself.
The fine scrubbing will remove bed in dirt that dulls the surface of your sink over time.
One side is done, the other is not! Can you find it?