Maelstrom!

This is a close-up detail; click on image to enlarge it.

To create my mixed-media collage Maelstrom, I needed two stencils:

http://stencilgirlproducts.com/stencils-9x12/view/310 is where I bought the 9"X12" stencil Eddy Rose, created by Mary Beth Shaw of StencilGirlProducts.com -- and, at the same website, I bought Circle Play, a 6"X6" stencil created by Margaret Applin ...
  http://stencilgirlproducts.com/stencils-6x6/view/672

In my thick base coat of black acrylic paint, I made impressions with the same stencils named above.  That part of this mixed-media collage is not shown here because, despite repeated tries, I couldn't take a photo of the whole piece due to its stubborn refusal to give up areas of reflected light!  I had to content myself with the close-up detail shown above.

After the black base coat, I added layer after layer of stenciled-in patterns in yellow, orange and red acrylic paint.  Between these layers I added strips of paper that I had previously painted in matching colors.