Vinegar and Salt Patina Tutorial. Because homemade patina recipes can have unpredictable results, your vinegar and salt patina on copper may wind up being any shade of green, blue, turquoise – or possibly even something else!
Homemade Formula for Aging Metal - 1 cup of hydrogen peroxide, 1 cup of white vinegar and two tablespoons of salt. Put it in a spray bottle. This can be used on anything you want to create an aged patina...copper, brass, galvanized or steel.