Dunno if this would count as a tutorial, but I played around to see if there's anything interesting I could figure out.

1. Make a new layer.
2. Apply Layer Style: Outer Glow to that layer.
3. Dial up the noise slider.
4. Set the blend mode for the layer style to something such as Vivid light.

Now anything you paint on the layer with that style applied should come out glitter-like. (Perhaps you could apply dissolve blending mode to the layer itself too.) I'm sure you could figure out other and better adjustments for it as you go along. What I figured out might be a quick and easy way to get started.

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Barbequed Pixels?

Your friendly neighborhood Wings3D nut.
Also feel free to browse my freebies at ShareCG.
There might be something worth downloading.