Porcelain sinks are attractive and durable, making them a popular option in many homes. Aluminium pots or pans often leave silver-grey stains on porcelain sinks. To remove these marks, you must use a cleaning solution that is safe for the porcelain, yet strong enough to remove the aluminium marks.
Dampen the sink with water, and sprinkle a light dusting of baking soda over the aluminium marks. The water will help the baking soda adhere to the sink.
Scrub the marks with a washcloth and rinse the sink.
Spray glass cleaner onto the sink, if any marks remain. Wipe clean with a washcloth, and repeat several times until the marks show no signs of improvement.
Fill the sink with enough hot water to submerge the aluminium marks.
Pour oxygen bleach into the water, using 2 tbsp per gallon of water used.
Scrub the stains with the washcloth once more and repeat until all aluminium marks are removed.