Message:

<p>[QUOTE=&quot;TheFinn, post: 3345881, member: 90102&quot;]I only use Methylene chloride or Chloroform.&nbsp; Works every time.&nbsp; Acetone can change the color - especially with copper coins.&nbsp; In the condition it is in, Acetone will be fine, then rinse with 91% Isopropyl alcohol (Rubbing alcohol), and blot dry with a cotton cloth.&nbsp; Do not rub or use paper.&nbsp; As I said, put the CLEAN Q-tip in the solvent and roll it and repeat until the Q-tip doesn&#039;t show green any more.&nbsp; Do not put a dirty Q-tip into the solvent, or you contaminate the rest.&nbsp; This is what the guys at NGC or PCGS would do.&nbsp; I have a B.S. in Chemistry, and have done this for 30+ years.[/QUOTE]</p><p><br /></p>

Your name or email address:

Do you already have an account?

• No, create an account now.
• Yes, my password is:
• Forgot your password?

Stay logged in