I'm definitely no sculptor, but after finally getting a chance to see my little mossy owl in daylight, I think I actually like it.
I followed the tutorial of black magic craft over on YouTube to get a stone effect using acrylic paint, but to be honest I didn't follow it to the letter as I was feeling kind of frustrated and tired at the time. Still, it seems to have helped a lot!
Here's the tutorial I used:
https://youtu.be/MU45M-MvOOQ