That is exactly the question to ask. Yes, basically, what "works" is anything that floats on top of the water and sticks to what you dip in it. But some things, and in particular some combinations, will work better than others. I don't follow instructions well, and when I go to the store to buy exactly the right thing, they invariably have something slightly different anyway. So when I do a project like this, I'm going to be winging it. That's what i suggest you do as well.

By the way, you're going to have to thin the paints to a watery consistency. There are a lot of thinners, with labels like Mineral Spirits, Paint Thinner, Lacquer thinner, Turpentine, "Turpatine", Naphtha, denatured alcohol, and so on. Some will work, some will not work. Among those that work, some will work better than others. You can also use drying oils like linseed oil to thin some paints. Experiment.

A good experiment might be to spray a lot of empty beer bottles with a light colored primer, marble them, and clearcoat them.