What fun! I've tried mosaics with polymer, but I haven't really tried to do much with collages. I owe a big thanks to Lindly Haunani who presented her version of collages at CFCF 2015. Of course, she used Skinner blend rainbows, and they made the collages especially attractive and interesting. My first piece to the left is pretty much based on Lindly's designs.
Then I started branching off on my own a bit, using white as well as black to delineate between the colored shapes. I also started trying different outlines for the overall shape of the pieces. Note the gold tone rounded piece in the middle in this cluster of pendants and pins.
Here's a shape and design I really like. One of the things that I love about polymer is the more you play, the more a technique or process evolves and becomes "your own." When you look at my first piece and then this one, I think you can see the evolution.
Next are some photos of earrings in various shapes, sizes and color-ways.
And, to add a finishing touch, I covered another little paper-mache' box using the collage technique.