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<p>[QUOTE=&quot;physics-fan3.14, post: 2042672, member: 19165&quot;]1. Die polish (or scratches, or tooling, or whatever other terminology you want to use) has a very different appearance in hand than hairlines from cleaning. As I mentioned previously, they affect the luster in very different ways. The &quot;not crossing devices&quot; thumbrule is just that - a thumbrule. Its one tool in the bag of tricks we have, and I don&#039;t think anyone ever intended that to be a 100% concrete proof. As Mark Feld always likes to remind me, making absolute statements can get you into trouble very quickly. </p><p><br /></p><p>2. The TPGs are generally very good at distinguishing die polish from hairlines. If a coin is slabbed with hairlines, it is because (most of the time) they have determined the quantity to be market acceptable (for example, PR-60 to 63 proofs from the mid-19th century). </p><p><br /></p><p><br /></p><p><br /></p><p>Please provide examples to back up your claims that TPGs confuse die polish and hairlines.[/QUOTE]</p><p><br /></p>

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