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<p>[QUOTE=&quot;Kimotej, post: 2601841, member: 83864&quot;]HAPPY HOLIDAYS!!</p><p><br /></p><p>I am sure that this topic has been discussed many times, but as a newbie here I would appreciate some advice on coin cleaning. I know that coins should &quot;never&quot; be cleaned, but as these coins were badly green coloured - probably from having been in plastic - I felt that they were not very nice like this and perhaps there was not so much to lose. </p><p>Therefore a small experiment - my first - with baking soda, aluminium foil and warm water. Just some 10-20 seconds in the bath and then I rinsed them off with (tap) water and dried them. The green is gone, but likely also a little of the silver?</p><p><br /></p><p>The two first pictures are before, and the two other are after the experiment.</p><p><br /></p><p>Now, is this something that is ruining the coins and should never be done, or is it &quot;saving&quot; the coins from the green guff that would otherwise just continue and eat away at the coins?</p><p><br /></p><p>Will the process continue or has it (the green stuff) been stopped?</p><p><br /></p><p>Will the &quot;cleaning&quot; process continue and should I stop it somehow?</p><p><br /></p><p>Will the environment now &quot;attack&quot; the surface of the coins as the protecting patina has been removed? Or has it been removed?</p><p><br /></p><p>There are so many here with so much knowledge, experience and opinions on this matter. Please comment so that we (at least I but hopefully also many others) can learn how to do and how not to do! </p><p><br /></p><p>Perhaps I will now receive a lot of comments on how stupid I have been to &quot;clean&quot; or having ruined these coins, but that´s OK! <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" /> I am here to learn from the more experienced, so just throw them at me and I will learn from them. Thank you very much in advance!</p><p><br /></p><p>Let´s get the discussion going![/QUOTE]</p><p><br /></p>

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