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<p>[QUOTE=&quot;wheelz, post: 24694448, member: 148512&quot;]My goal isn&#039;t to clean/alter the coin itself but just remove particulates that are not a part of the coin (conserve / restore). I understand that it won&#039;t make the coin inherently more valuable. However, for some coins that may have PVC haze or foreign material buildup that are obscuring the view of it. I&#039;m trying to test out this process to see what it can remove to make the full true condition of the coin visible, which hopefully would show it is in better condition than it looks (though could also reveal flaws). Also I want to see if it does make any color changes or alters the coin itself. I thought I would just share my outcomes in a thread for the benefit of all.</p><p><br /></p><p>I started out with some modern junk zinc pennies that are pretty obscured (not fully sure what is part of the coin and what is not). I should have re-taken pictures before to keep the lighting consistent so they may be some color changes due to that. I&#039;ll take before pictures next time. I meant to leave them in the acetone for 24 hours and flip them about 12 hours in. I did that but also life happened and I didn&#039;t get a chance to get them out last night so the reverses got an extra ~12 hours. I soaked them for this long to give it what I thought would be an extreme to test if it had any adverse effects.</p><p><br /></p><p>1989 Obverse Before:</p><p><br /></p><p>[ATTACH=full]1576057[/ATTACH] </p><p><br /></p><p>1989 Obverse After:</p><p><br /></p><p>[ATTACH=full]1576061[/ATTACH] </p><p><br /></p><p>Looks like a little reduction in the white / green around the edge. The dark area isn&#039;t quite as dark. I see a slight lightening of the brown/orange coloring but again, that could be lighting differences. I think it very well may be that as the paper I have it on has a slightly different tint to it.</p><p><br /></p><p>1989 Reverse Before:</p><p><br /></p><p>[ATTACH=full]1576058[/ATTACH] </p><p><br /></p><p>1989 Reverse After:</p><p><br /></p><p>[ATTACH=full]1576062[/ATTACH] </p><p><br /></p><p>Again seeing a little reduction of the white in some areas (near the O in ONE) but not so much in other areas. Perhaps if I ran this cycle multiple times it would eventually remove it?</p><p><br /></p><p>1989-D Obverse Before:</p><p><br /></p><p>[ATTACH=full]1576060[/ATTACH] </p><p><br /></p><p>1989-D Obverse After</p><p><br /></p><p>[ATTACH=full]1576063[/ATTACH] </p><p><br /></p><p>Again maybe some slight reduction in the green. It still looks like it just has particulates sitting on top of the coin. I know better than to rub the coin but what about shooting it with compressed air to try to get the chunks off?</p><p><br /></p><p>1989-D Reverse Before:</p><p><br /></p><p>[ATTACH=full]1576059[/ATTACH] </p><p><br /></p><p>1989-D Reverse After:</p><p><br /></p><p>[ATTACH=full]1576064[/ATTACH] </p><p><br /></p><p>Similar result. I can can start to see the bottom of the Memorial building through the big white chunk at the lower right side of the base. Other white areas may be slightly reduced or the same.[/QUOTE]</p><p><br /></p>

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