Patina--vinegar (white or apple cider) and salt. For small items, fill a quart yogurt container half full of vinegar, and sprinkle in about 1 tsp salt. Add any metal you want to 'age'. Seal if you touch items a lot
My Artistic Side: Dolling up ordinary finds--This is what you do with all those old strange bottles you've aquired after cleaning out your parents or grandparents house, and you're too sentimental to throw them away.