Yes David, I virtually always use oil pastels (when I use them) UNDER the watercolour as a resist. If I want colour on top of the watercolour I'd use polychromos/lyra/coloursoft coloured pencils (don't like Prisma myself)
It's one of the things I picked up on my degree - no rules
- use anything with anything as long as it works
these aren't in my sketchbook but are quick demos done for students to shwo how to combine media. Lines scribbled in white Sennelier oil pastel with watercolour freely washed over for the water and sand.
and this one uses coloured oil pastels as well with again, watercolour dropped over them quite freely
Yes, the oil paint never ever sticks Michelle. I've used normal oil paints and Griffin Alkyd quick drying oils - obviously you don't put the paint on with a trowel
or it would squidge and spoil the painting. I use very little/no medium usually. You can even leave the book closed while the painting dries and it still doesn't stick. It's the oil that stops it. Also it never buckles the paper like water can.
(interestingly I was reading that Sargent didn't use any medium)
These aren't paintings - just doodles to show possibilities to students in class.