I use Cyanide and Iodine to remove gold from cold coated computer parts. Next week I'll tackle metal pins. Cyanide videos: Cody; https://www.youtube.com/watch?v=VUeooyhD5Xk NurdRage; https://www.youtube.com/watch?v=xz7i11XC9wk Help me make videos by donating here: https://www.patreon.com/CodysLab