Message:

<p>[QUOTE=&quot;Kentucky, post: 2548893, member: 33176&quot;]The presence of NaOH or KOH in MS-70 means that it will have a saponifying (soap making) effect on many organic residues.&nbsp; The most common plasticizer for PVC is dioctylphthalate, and NaOH or KOH would destroy this.&nbsp; A strong stream of water is often sufficient to move stubborn residues off of coins.&nbsp; The only time I would really worry about &quot;rub&quot; marks on a coin would be if it were a nice BU piece or a Proof.[/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