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<p>[QUOTE=&quot;kyratango, post: 505007, member: 5006&quot;]The touch stone is the way to test without significant damage<img src="styles/default/xenforo/smilies/smile.png" class="mceSmilie" alt=":)" unselectable="on" /></p><p>Rubbing an edge hard enough to reach metal under plating will leave a good trace on the stone on which the applied acid will say what alloy.</p><p>I can&#039;t understand why people think dropping the acid directly on the piece is a better method<img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie29" alt=":bucktooth:" unselectable="on" unselectable="on" /> (except for damaging it<img src="styles/default/xenforo/smilies/mad.png" class="mceSmilie" alt=":mad:" unselectable="on" />)[/QUOTE]</p><p><br /></p>

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