Something tells me you didn't open the posted link.
replyI guess I don't know how sharp a pick with an orange handle is from harbor freight, compared to a needle.
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replyIn fact, I believe that the article is describing a reinvention of this technique! Just with a plotter on oil rather than a compass on plastic.
replyHe did it on plastic CD cases, not oil. The oil in the beginning of the article was just for explaining the refraction that happens with the ridges in the structure.
replyAh, whoops, thanks!
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