I have been trying to experiment using a comb with acrylics. I had some trouble finding a comb, but I finally found one.I used watercolor paper and gave it a few washes in watercolor and then in acrylics, both undilited and diluted. This was done after spread modeling paste over the original washes. After that, I ran a comb through the washes while wet both horizontally and vertically. I then ran the comb through again after drying it a little and got the white specs. I completed the painting by adding touches of color to the spot of interest.
I love to paint and try to do so every day. I am having immense fun blogging. I love being in touch with so many good artists and seing their art. I learn a lot about painting this way. I especially enjoy participating in the challenges.