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For light and recent stains, simply use warm water and soap. Mix water with soap and use a sponge to clean the surface. Then dry well with a cotton or microfibre cloth.
Vinegar also helps to effectively eliminate stains. Pour a few drops into water and apply it to metals. Remember to dry well.
To clean copper well, cut a lemon in half and rub it over the entire surface. Afterwards, clean well with a dry cloth.
To clean brass you can use a solution based on water, vinegar, flour and salt. Apply it with a toothbrush and rub well on the surface. Leave to act for 10 minutes, then rinse with water and dry well.
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