Here is the result of a mixture of silver oil based enamel paint and watercolor/fluid acrylic poured onto damp w/c paper. Pretty dramatic, wouldn't you say? I thought so.
This is the result after dropping silver oil based enamel into wet watercolor on paper. The enamel tended to push the watercolor away and create it's own blooms on the surface.
This is gold metallic oil paint thinned with mineral spirits, then premixed with a watercolor/fluid acrylic mixture and poured onto damp paper. I couldn't get a very good photo but I was pleased that the thinned paint dispersed much better on the surface. The look is much softer IRL and the closest to Ann Blockley's results.
Instead of dropping the oil based paint onto wet paint/paper I premixed it with my watercolor/fluid acrylic and poured it onto damp paper. It formed this scroll work all on it's own.I continued to experiment with the oil based paint today. In all the trials I used #140 CP Fabriano Uno w/c paper as a substrate. All of my results were interesting and created varying effects. Some of my water based mixtures were straight watercolor, some with fluid acrylics added. This is not something I would try during the winter months due to fumes and lack of proper ventilation.
Observations: I noticed if I wanted to manipulate the oil paint on my paper I needed to do it as soon after applying as possible. Otherwise I wound up with slightly congealed (and partially solid) masses or 'islands' of oil paint floating on the wet surface that broke apart in a very unattractive way when I tried to use a bamboo skewer to disperse them.
Also I mixed my oil paint/watercolor combos in those flimsy mini yogurt cups. Next time I will find something sturdier as the oil based paints will dissolve the bottoms of these containers in fairly short order.