Members asked me about sources for creating metallic finishes that look like Copper, bronze or iron on wood at the September 2018 meeting.   I use Modern Masters metallic kits.  They come with a primer, the metal paint, an drew oxidizing solution.  I use a smaller hand held spritzer spray to put on the solution.  Here is a link for you to try it:  https://www.modernmasters.com/landing/homeowners/brands/me