You know what, there are so many of these helpful things out there that it helps to mention them now and then
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I'm sure that engravers have been using wax transfer methods long before you and me. Still, we keep circulating tips and techniques because new engravers keep coming and they need to learn what we know. We have the web, we have books and we have dedicated instructors who continue to foster the art of engraving.
Never miss an opportunity to share the knowledge!