Started with a base of Indigo Float all over the interior and exterior, then added a thick swirl of Blue Midnight with a squeeze bottle just on the inside, hoping they would meld together in a swirl shape. Added some splotches of Cosmic Tea Dust on top of swirl at the end. The outside only has Indigo Float on it. The Indigo Float and Blue Midnight on the interior mixed nicely. The Cosmic Tea Dust splotches on top of the swirl did not move at all.