Lesson 4 | Air and Water Resources
Metal cleaners & polishes:. Brass: a soft cloth dipped in lemon-and baking-soda solution, or vinegar- &-salt solution. Chrome: baby oil, vinegar, or aluminum foil shiny slide out. Copper: boil the article in a pot of water with 1 tablespoon salt and 1 cup white vinegar, or try differing mixtures of salt, vinegar, baking soda and lemon juice. ................
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