It currently looks like this
I now have two options to use for the dirty water effect.
The first is a two part crystal resin kit that I used to create the water effect in this mini base
That wasn't my most successful pour by the way :) I managed to tidy that up quite a bit....in fact I will post a pic of that mini (Malifaux December Cult Ice Golem) when I remember. Now personally that is too clear for the effect that I am after. I want something that looks more like a muddy puddle with an effect along these lines. (Image from http://www.ediorama.com)
Looks like it was created using this stuff.