Glyerine, corn syrup, salt water, ink, glitter. Try it, see what happens.

As well as the practical tips of how to achieve some of the effects which are eerily similar to what I already had in mind, there is a clear articulation of why I want to shot my film in a similar way.
Making space tactile and visceral rather than digital, I see as a way to bring about a physicality that is counterpoint to the internal nature of the voice over. It is an attempt to make the conceptual tangible.