I had watched MANY youtube videos and this was the one I wanted to try. It looked so interesting.
On the night before a flight to America to visit my in-laws, in a hotel room, my husband and I tried this.
To do water-marbling, you only need a few things...
a paper-cup
something to drag the polish around to make a pattern on the water
clean water
2 or more polishes (that will spread on the water)
Cellotape
First, you need to tape around your nails, so that your skin is covered.
Next, fill your papercup with clean water, to near the top of the cup.
Start dropping your nail polish in drops on the water, building on top of one another, creating a bullseye effect.
Use your dragging tool (a dotting tool/toothpick/orangestick/needle), move the polish around on the surface of the water to make a design.
When you are happy with your design, dip 1-4 fingers into the design, keeping your fingers parallel to the design, and then dropping them into the water.
Use your dragging tool, once more, to remove the excess polish on top of the water, so when you pull your fingers out, your design will not be ruined.
Remove the tape, and repeat for remaining fingers.
Here is the results of my first attempt:
I think my first attempt worked pretty well, don't you?