Message:

<p>[QUOTE=&quot;Sulla80, post: 3903675, member: 99456&quot;]It may be hard to come to any conclusion without waiting a very long time. </p><p><br /></p><p>In general, this thread could use some ancient coins : I used olive oil soaks and a variety of brass brushes and scraping tools to clean AE coins ~20 years ago and I still have some of those coins - no evidence of any damage or disintegration 20 years later, but I wasn&#039;t working with priceless coins and I can&#039;t vouch for what this coin will look like in another 2000 years.</p><p>[ATTACH=full]1028956[/ATTACH]</p><p><b>Maximianus Herculius</b>, AD 286-305, Struck AD 295-299, Cyzicus, Radiate Æ</p><p><b>Obv: </b>IMP C M A MAXIMIANVS P F AVG, radiate, draped, and cuirassed bust right</p><p><b>Rev:</b> CONCORDIA MILITVM, Jupiter presents Victory on a globe to Maximianus, KE between</p><p><b>Ref:</b> RIC 16b</p><p><br /></p><p>Here&#039;s a very accessible web page on the <a href="https://www.oliveoilsource.com/page/chemical-characteristics" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.oliveoilsource.com/page/chemical-characteristics" rel="nofollow">chemistry of olive oil</a> and there are certainly more technical analyses of fatty-acid/bronze interactions that would discourage use - I read this as: even if the olive oil might be fine, its degradation in the real world can cause damage:</p><p><a href="https://smile.amazon.com/Copper-Bronze-Art-Conservation-Publications/dp/0892366389" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://smile.amazon.com/Copper-Bronze-Art-Conservation-Publications/dp/0892366389" rel="nofollow"><b>Copper and Bronze in Art: Corrosion, Colorants, Conservation</b> By David A. Scott</a></p><p>[ATTACH=full]1028961[/ATTACH]</p><p><a href="https://restorationproduct.com/shop/renaissance-wax/" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://restorationproduct.com/shop/renaissance-wax/" rel="nofollow">Renaissance wax</a> probably a safer bet for preservation and 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