I actually used the lids off 2-liter soda bottles for creating my watercolor paints (who knew being lazy and not taking out the recycling would pay off?). I only have fine point Sharpies, so it made this slightly more difficult, but I still think it was easy enough to execute. I started off with a base of OPI Be There in a Prosecco. I created my watercolors using blue, purple, and green Sharpies and rubbing alcohol. I then used a small nail art brush to paint the colors on each nail.
While mine didn't look exactly like Jema's, I was still pleased with the outcome and how easy a technique it is. It ends up with a really cool marble effect that I've not done before! I definitely see more water color designs in the future!