If you have artisan, real brass or copper fixtures different cleaning methods will apply. See below for step-by-step instructions. However, you may not want to clean copper at all. When it is exposed to air over time, copper tarnishes (oxidizes).
Question: I just came into proud possession of some nearly 1year old arts and crafts copper candlesticks and various copper and bronze bowls.
Do not use abrasive cleaner or steel wool to clean copper.
My father has an old copper watering can and it is very brownish and has been outside for many years and was wondering if it could be brought back to life ?
Brass and Copper outdoor lighting should cleaned periodically to prevent deterioration. This article offers several natural alternatives to commercial brass and copper cleaners which can be made from items already found in most kitchens. Fixtures should be clean of oil and dirt with Windex-type cleaner.