So, I was just sort of tossing some ideas out there and I wanted to hear other people's views and ideas.
I was thinking about a Benzene And Water solution, combined with a goo-kit or some retro goo. Basically the Benzene serves as a second, mobile layer. It's not truly two independent waxes but I think it could work.
Also, Astro suggested that Thermochromic Ink might be able to give one wax batch a unique color while changing it's density.
I was wondering if a Synthetic Yeast would have an effect on either a basic retro-wax or a goo-kit.
Heh I was always fascinated at the idea of an "Aquafresh" type of lava lamp with multiple colors. Now, when the blobs of normal goo are heated and some descending/ascending, they don't easily mix away from the coil because of different densities and surface tension -in fact they rebound-.
Now, if there were two or more kinds of goo inside the globe...first of all there should be much less wax than in a normal lamp, let's say barely enough to form 2-3 medium-to-small sized blobs for each color. I can imagine how to get them there the first time: pour goo #1, let it cool, pour goo #2, let it cool, add liquid, seal
IMHO, the real magic would be in the lamp base's design: instead of using one flat bottom with one coil, use a bottom divider (e.g. in 3 or 4 compartments) each with its own independent coil. This way, blobs would have a greater chance of breaking, settling and reforming individually in one of the compartments, thus preserving unique blobs longer and delaying/avoiding mixing between different blobs. Even when cooling, blobs would preferentially "land" in a compartment, cool there, and restart from there, while avoiding mixing at least for a while
This mechanism would force the blobs to be of a particular size though.