Paint a Night sky with Watercolours

 I'm playing in my journal and trying to see if there was a simple way to paint a night sky with watercolours.

Here is the result of sprinkling kosher salt over it:



It didn't really work at all and just left traces of salt all over the surface.

This is the result of dipping an old toothbrush into melted wax and running a toothpick across it to spray the page with droplets:



A lot better but not quite there. The wax leaves a residue on the paper, though I'm not sure if it matters yet.

Any other ideas?