First, do your background with alcohol inks or pinata inks.
Next, dip a paintbrush into 91% rubbing alcohol. Use a fine tipped paintbrush. Paint a design.
Then dip the paintbrush in a solid color of ink and paint over the design.
To make the dots, barely touch down with the tip of a fine paintbrush dipped in rubbing alcohol:
It looks a bit like watercolor paint....but it's not, it's ink! What fun!!!