put device in bag 2) put bagged device in another bag 3) pour in a mixture of different colored beans, forming a visual mosaic 4) send picture of mosaic to recipient
I remember back around the time the START treaty was being negotiated (1989?), I read about the seals they developed to use during a weapons inspection. It was mica flakes in epoxy resin, painted over an identity label. They took pictures with light sources at multiple angles to capture the mica pattern. Now I can't find any documentation of it!
The industrial product to use instead of glitter nail polish is Scotch-Seal Tamper Proof Sealant 1252.
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