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<p>[QUOTE=&quot;GDJMSP, post: 2529560, member: 112&quot;]Hairlines on a coin can be caused by many different things, harsh cleaning is only 1 of them. Rough handling is the most common cause of hairlines. Merely laying a coin down on a surface, almost any surface, may, and often does cause hairlines, particularly on Proofs and/or Proof Like coins.</p><p><br /></p><p>And in many cases hairlines are notoriously hard to see, let alone photograph. </p><p><br /></p><p>When it comes to grading, hairlines present on a coin will always have a negative impact on the grade, but will not necessarily make the coin ungradeable. But if severe enough, yes they can make the coin ungradeable. In other words it&#039;s a matter of degree.</p><p><br /></p><p>Determining whether hairlines were caused by harsh cleaning, or by rough handling, requires experience, often a good deal of experience. Like so many things in this hobby each has a different look. And it is also not uncommon to see hairlines caused by both things - rough handling and harsh cleaning - on the same coin. And this is partly why some have so much trouble telling if a coin has been harshly cleaned or not. But with enough experience, you can tell the difference.[/QUOTE]</p><p><br /></p>

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