On NGS group, we're doing a study of Darlene Olivia McElroy & Sandra Duran Wilson's book "Surface Treatment workshop " This week we're looking at the section "Rubbing Alcohol". This is the same technique as the alcohol dissolve on acrylic technique.I was able to do this technique a few years ago, but had trouble this time. Even though I used 70% rubbing alcohol last time, I got no results this time. So I purchased 91% rubbing alcohol (the strongest concentration I could find).
I re read the book, the authors state that the effect of this technique is more dramatic on a slick surface than on a porous one. Now I see, last time I did the technique on a gesso primed canvas. This time I used watercolor paper. That explains it. (I'm better at looking at pictures than reading all the instructions)
If desired, paint surface first with acrylic paint and let dry (I used marigold acrylic paint). Use a thin coat of diluted paint or liquid acrylic over the surface: