Pouring molten aluminium into things is always a fun science experiment so let's see what happens when the hot hot gooey metal gets dropped inside a groovy lava lamp. A lot of what you expect to happen, happens: the molten aluminium initially follows the wax pattern but then eventually overwhelms the liquid and starts burning its way through the lamp.
But at the end, you'll see how it settles in. It doesn't just burn straight trough, but pools up in strands like so. I guess it followed some sort of lava lamp pattern!
Bonus: Here's what happen when you inject the "lava" from a lava lamp into regular water. The wax like solidifies instantly into a snake-like, sea horse-like object: