Polish Brass and Copper
Restore tarnished brass and copper items with lemon, salt and vinegar. These natural acids dissolve oxidation and bring back a warm shine without commercial metal polish.
Quick answer
Wash the item in warm soapy water and dry it. Rub a cut lemon dipped in salt over the tarnished areas. Rinse and dry thoroughly. For heavy tarnish, apply a paste of bicarbonate of soda and white vinegar, leave for five minutes, then scrub gently and rinse.
Brass and copper tarnish when exposed to air and moisture. You do not need specialist paste to fix it. Common kitchen ingredients cut through the dull layer of oxidation safely.
What you’ll need
- soft cloths
- lemon
- salt
- white vinegar
- bicarbonate of soda
- warm water
- soft toothbrush
- brass lacquer (optional)
Step by step
- 1
Wash the item first
Remove dust and surface grease with warm soapy water and a soft cloth. Dry the piece completely so the polish can reach the tarnish directly.
- 2
Polish with lemon and salt
Cut a lemon in half and dip the cut face into table salt. Rub it over the tarnished metal in circular motions. The citric acid and mild abrasion lift oxidation quickly.
- 3
Rinse and dry
Wipe away the lemon residue with a damp cloth. Rinse under warm water if the item is solid and has no openings that trap moisture. Dry immediately with a clean soft cloth to prevent new tarnish.
- 4
Treat heavy tarnish with soda and vinegar
Mix three parts bicarbonate of soda to one part white vinegar into a thick paste. Spread it onto stubborn spots with a soft toothbrush. Leave it for five minutes, then scrub gently and rinse.
- 5
Buff to a shine
Rub the dry metal with a clean microfibre or cotton cloth. Use steady pressure and keep turning the cloth to a clean section. The friction produces a bright, even finish.
- 6
Apply lacquer to slow future tarnish
If the item is decorative and not handled often, spray a thin coat of brass lacquer in a well-ventilated area. This seals the surface from air and moisture.
Check whether the item is lacquered before using acidic cleaners like lemon or vinegar — acid strips the lacquer and dulls the finish. Use any lacquer spray in a well-ventilated area.
Frequently asked
How can I tell if my brass is solid or plated?
Hold a magnet to it. Solid brass is not magnetic. If the magnet sticks, the item is likely steel or iron with a brass plating. Be extra gentle with plated pieces.
Can I use tomato ketchup instead of lemon?
Yes. The acid in tomatoes works similarly. Apply a thin layer, leave for five minutes, then rinse and dry.
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