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<p>[QUOTE=&quot;Insider, post: 2785611, member: 24314&quot;]imrich, posted: &quot;There is an appreciable difference between generating further damage to a coin covered in residue, and removing the residue to view underlying damage, without further evidence of damage.&quot;</p><p><br /></p><p>AFAIK, TPGS&#039;s differentiate between a &quot;residue&quot; which can easily be removed in most cases no matter what it is; and &quot;black corrosion&quot; that has destroyed a coin&#039;s surface.&nbsp; There are ways to make corroded coins more attractive.&nbsp; Unfortunately, much of the time these efforts can be detected by another conservation specialist. Several of the coins in your test appear to be corroded to my &quot;untrained&quot; eye.&nbsp; They will require several steps of preparation before you even get near the final dip. </p><p><br /></p><p>&quot;A coin having terminal underlying damage can be aesthetically improved, but damage is irreversible, generating an assumption of &quot;cleaning&quot; rather than &quot;conservation&quot;. The difference is whether the &quot;patient&quot; has improved health (i.e. further damage or not).&nbsp; The commercial &quot;conservators&quot; only improve the appearance, not reverse the condition, but we don&#039;t label their efforts as cleaning, and issue grades to their efforts.&quot;</p><p><br /></p><p><span style="color: #b30000"><b>Oh, yes we do </b>if their work can be detected (not market acceptable).</span></p><p><br /></p><p>&quot;As I stated earlier in this thread, I&#039;ve several expensive Gold coins at a TPG, being notified that residue removal is suggested to facilitate a grade. It doesn&#039;t require an I.Q. test to answer the query.&nbsp; We will see the possible difference in the coins re-grade.&quot;</p><p><br /></p><p>You can be 95% sure if they ask to &quot;fix&quot; your coin it will straight grade...possibly even upgrade. No news here.&nbsp; While I highly recommend NCS (if that is the place) AFAIK, other TPGS&#039;s do this work also.&nbsp; One of them does not charge for the service!</p><p><br /></p><p>imrich, posted: &quot;You generally will not acquire a grade if politically unattended damage is viewed by the TPG.&quot;</p><p><br /></p><p><b><i><span style="color: #0000b3">ZOOM!</span></i></b>&nbsp; That&#039;s the sound of this post going right over my <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie30" alt=":bucktooth:" unselectable="on" unselectable="on" />head.&nbsp; I assure you I can read <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie26" alt=":bookworm:" unselectable="on" unselectable="on" /> yet have not idea on this one.<img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie46" alt=":facepalm:" unselectable="on" unselectable="on" /> <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie80" alt=":shame:" unselectable="on" unselectable="on" />[/QUOTE]</p><p><br /></p>

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