Good god it has been years since I did a sig this small, and years since I used similar smudge settings. Personally I don't like how it turned out but hey.
Exactly 200 sigs earlier:
The smudge is a little difficult to see under all its layers but I tried to experiment with a few, from a large, to small hard brush (used the small on the Prometheus one last night) and a chalk brush with a variety of settings. All good fun.