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
Check out "DIY Home Decor- Cork Bottles " Decalz title='Lo. Love wine and have a large collection of corks, have thought about making art out of them. Love the ombré effect of this from the red wine corks!