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<p>[QUOTE=&quot;yakpoo, post: 821454, member: 18157&quot;]A while back I encountered an OBW roll of Franklin halves that had horrific whitish spots all over them. I initially thought they were &quot;milk spots&quot; (I had never encountered milk spots before) and was quite excited when I stumbled on a method of removing them without damaging the coins.</p><p>&nbsp;</p><p>As it turns out, the spots I had were mold spots...NOT MILK SPOTS. I sent one of the restored halves to NGC for grading and it came back MS65. I&#039;ve since sent a number of restored coins to NGC and MS64 has been the worse grade.</p><p>&nbsp;</p><p>I&#039;m sure this will generate plenty of comments, but this is what works for me...</p><p>&nbsp;</p><p>1. Take a cereal bowl and place a paper towel in it, folded in quarters.</p><p>&nbsp;</p><p>2. Pour enough ammonia in the bowl to cover the paper towel with at least 1/2 inch of liquid.</p><p>&nbsp;</p><p>3. Place your coin in the ammonia and gently run your finger over the surface to work the ammonia into the spots. Do this to both sides. The coin should feel very slick...or oily to the touch.</p><p>&nbsp;</p><p>4. Add an equal amount of boiling water to the ammonia and let it sit for about an hour...long enough for the water to cool.</p><p>&nbsp;</p><p>5. Add an equal amount of white vinegar to the ammonia/water solution and again gently run your finger over the surfaces again.</p><p>&nbsp;</p><p><b>NOTE: This will also remove toning...attractive or otherwise so be sure that&#039;s what you want to do.</b></p><p>&nbsp;</p><p>6. You can try rinsing the coin at this point and see if the spots are gone. In my case they weren&#039;t. I repeated this same process, but this time I added one more step.</p><p>&nbsp;</p><p>7. <b>The final step</b> was to add a heaping teaspoon of baking sode to the Ammonia/Vinegar mix. The baking soda reacts with the vinegar and foams up rather dramatically. There&#039;s something about this reaction, along with the ammonia, that does the trick.</p><p>&nbsp;</p><p>8. I again gently rub my finger over the surface of the coin, but am careful <b>NOT</b> to rub any unreacted baking soda against the surface of the coin.</p><p>&nbsp;</p><p>8. I rinse the coin and it looks spectacular!!</p><p>&nbsp;</p><p>I&#039;m not quite sure why it worked for the spots I had. Any one or two ingredients didn&#039;t remove the spots, but this process, done together, removed the spots and <b>left a beautiful mint luster bloom</b>.</p><p>&nbsp;</p><p><b>NOTE: Never do this on anything but 90% silver coins. This will destroy other types of coins...especially clad coins.</b></p><p>&nbsp;</p><p>I&#039;ve since restore other silver coins using this method. Some with nearly black, unattractive &quot;toning&quot;. MS64 has been the worse grade I&#039;ve received from NGC on any of the restored coins.</p><p>&nbsp;</p><p>Hope this helps...[/QUOTE]</p><p><br /></p>

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