After that dried, I used a circle stencil to add raised bubbles with light molding paste and waited for that to dry. You can always lightly sand to even them out...I didn't, I like the course texture and irregularity of them.
Once the raised 'bubbles' were dry, I brushed them with a glaze of interference pearl, and then a light blue acrylic ink. The beauty of acrylics...all the various paints, inks and mediums work beautifully together! So there you have it....
Herschel and Selma