Thank you all for such kind replies
This was my first attempt at the marbling effect. I actually painted this model specifically because I wanted to try it out, and I figured that it was a good way to use it.
The plinth is actually an old metal LOTR piece, which was sitting in my bitz-box for the last 12 years or so. I can't recall the set from which it came, but it was one of the metal movie-scene sets that GW released back in the day.
The cat model is a reaper miniature. It came from a familiar pack:
The same pack includes an adorable little hedgehog, which I'll have to find a place for at some point
Thanks all!