Here is one card I made using this technique:
If you'd like to try this technique yourself, I've developed this tutorial in photo images:
Here are some supplies you'll need: watercolor paper, painter's tape, acetate circle stencils that you cut yourself, any kind of watercolor paints, and any kind of paint brushes.
Pigment ink dries fairly quickly. Again, if you'd like to rush it along, blow some warm air over the ink using a craft heater. Once the white Bokeh circles are dry, stamp your images on top of the circles. Mat your watercolor paper on top of layer(s) of cardstock and embellish the art as you choose.
Here, I used a retired Close To My Heart stamp set called "Quick Cards - Bumble Bee" (A1135), along with adhesive gems from CTMH and ribbon from May Arts.