Message:

<p>[QUOTE=&quot;Gerard, post: 45544, member: 2763&quot;]<b>I think they all have merit</b></p><p><br /></p><p>I discovered the WD40 cleaning solution by mere chance at another Internet forum: <a href="http://www.canadiancoin.com" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.canadiancoin.com" rel="nofollow">www.canadiancoin.com</a>.&nbsp; There a former chemical engineer commented on the WD40 formulation and suggested that people try it to clean stubborn coins.&nbsp; Neither silver or copper coins would not react to it.&nbsp; Tarnished coins could react if they oxidized due to contaminants.</p><p><br /></p><p>He commented that distilled (water unless purchased from a reputable commercial source) wasn&#039;t normally mineral free.&nbsp; In home systems, some organic contaminants like chloroform and cleaning fluid (solvents) may leave the water with the steam and end up in the final water when the steam is cooled.&nbsp; Using some sort of heat exchanging process to collect evaporated water forced through refrigerated copper tubing would give the water an unusually high copper content. </p><p><br /></p><p>I think that distilled water makes a great rinse after the cleaning cycle is completed.&nbsp; It doesn&#039;t clean coins of finger grease or grime without a scrubbing.&nbsp; WD40 loosens without much scrubbing.</p><p><br /></p><p>As a test, I tried WD40 on face value heavily crudded coins.&nbsp; After a few days in the soaking solution, the crud was easily removed in a rinse of running tap water.</p><p><br /></p><p>Interestingly, acetone in relatively high concentrations can be had at most dollar shops.&nbsp; I picked up a bottle in a shop with a content of 80%.&nbsp; The rest was lanolin and stabilizer.&nbsp; This approach is much better than the jewellery/coin dipping solutions available to collectors.&nbsp; </p><p><br /></p><p>As with WD40, I would rinse my coins after cleaning.[/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