I haven't done a water marble in ages, I forgot how cool they are! I would like to make them a little more uniform, but one of the cool things about water marbles is the way each nail comes out differently. For this, I used Finger Paints Cordur-Orange, Sinful Colors Black on Black, China Glaze Ichabody, and American Apparel California Trooper. Tip: I discovered that warming the water very slightly helps to keep the polish malleable for a little longer.
Below: please excuse the messy cuticles on my left hand; the orange polish did not want to come off.