How to Get Instant Hardware Patina | Family Handyman

I’ve found that using gun bluing ($10/3 oz. at sporting goods stores) gives off-the-shelf hardware an attractive, aged patina. Simply dip nuts, bolts, washers or other hardware in a cup of gun bluing. When the hardware turns black, rinse it with clean water and dry it with a paper towel. Be sure to wear rubber gloves and eye protection. — Matt Boley