Here is a video on how to recover gold from things like gold fingers, plated pins, cell phone boards, and more! There is NO Hydrogen Peroxide added!! OInly one chemical in play which makes it easy. No measuring, just pour, turn on, and go. As always, with acids you need to be careful! For cell phone boards, treat the same way as you would trimmed fingers. For plated pins, the strainer bucket is not needed, instead, a glass stir rod or large plastic spoon to move things around from time to time.