Attached Link: Dual Materials with Stencils

In case you didn't find it among the 3000, the linked thread discusses decals. It begins with a car paint shader, which happens to have sparkles. Have a look.

The theory is that you need tiny areas that have extremely high specular reflections. A Noise node is great for defining them. In that shader I plugged a Noise node that varies from 0 to 3 into the Specular_Value channel of the material. This causes the specular to be very irregular and very bright in some places - just like metallic paint.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)