I really love using the Percolator app because I always get some surprising results. One of my favorite blends is Tripstamatic because of the neon and psychadelic colors. Since you don’t really have control over where the circles are placed I make several Percolated versions and edit them in Sketchbook Pro.
The first photo is taken with my iPad and filtered with the moreBeaute2 app to smooth out the skin color.
I make two different Percolated versions with slightly different colors.
Finally I import all three versions into Sketchbook Pro on different layers. I erase areas from the top two layers leaving the colors that I want most. I also change the opacity of the layers to make the design more subtle.