I have some gold buttons that I have tested to be sub 10 K gold. When i test them they make 1 or 2 bubbles in the scratch with the 14K test solution. What do I need to do with these pieces to refine them to 22-24K Gold? I am a newbie to this and thought I would ask the pros before I waste a ton of time and money on something I could get answers to on here. Thanks for your time in advence.