PBS-TV’s Graham Haley shows you how simple table salt and lemons (citric acid) can put the clean on your tarnished copper and brass pieces. Keeping copper and brass clean and shiny can be a tricky task, but with a few simple tricks and ingredients, you can restore their beauty without using harsh chemicals. Here are some of Haley’s Hints for cleaning copper and brass: 1. Lemon and Salt: Cut a lemon in half and sprinkle salt all over the cut…