Sometimes, when I am working on a proect, I find myself confronted with the fact that one technique is not enough to reach my goal. That’s when I start mixing.
Techniques that combine well are watercolor and ink,. Watercolor is difficult to control,. By using pen and ink or a wooden stick to apply ink, finer lines can be drawn and working more detailed becomes possible.
Another option is to combine watercolor and collage, pencil and watercolor or soft pastels and pastel pencils.
Actually everything is possible as long as paper and other working materials allow it. It will be more difficult to combine watercolor and pastel, but in art, nothing is impossible.