Next, I'm going to go back to the Spec Channel image, right as it comes out of the (Instanced) Scale tool, (before it goes into the Color Corrector which isolates the hottest Spec-hits,) and drag another branch of the Scale's output to feed a Glow tool to get a nice, "nylon-stocking-over-the-lens" feel to the Spec-hits.

I then Merge the "Star Filter" (Highlight) pass over the Glow's output using Overlay to get a nice, misty, dreamy element we'll be blending into our final image.

Finally, we Merge the Star and Glow Pass over the output from the first Branch using Lighten, to get something that looks pretty darn spiffy!