: For stubborn black patches, mix white vinegar and baking soda into a thick paste. Apply it to the vessel, wait for 10 minutes , then scrub and rinse.

To clean a 70-year-old brass kadhai (vessel) and restore its golden shine, you can use traditional, non-toxic kitchen ingredients that safely break down decades of oxidation.

: Cut a lemon in half and dip the fleshy side into coarse salt. Rub it directly onto the brass surface in circular motions, squeezing slightly to release the juice. The citric acid reacts with the tarnish while salt acts as a gentle abrasive.

For heavily tarnished antique brass, these methods are highly effective:

: This is a classic Indian method for old brass. Soak a small ball of tamarind in warm water to make a thick pulp. Apply the pulp all over the kadhai and let it sit for 10–15 minutes . Scrub gently with a soft sponge; the natural tartaric acid will "melt" away the blackness.

: For very thick layers of grime or grease, boil the kadhai in a large pot with water, 2 tablespoons of salt, and 2 tablespoons of vinegar for about 15 minutes to loosen the buildup before scrubbing. How to Clean Brass Utensils at Home