I learned that you can both oil and chalk pastels in the same work. Who knew?
to use oil pastel to outline and soft pastel to fill, I knew I wanted to try this. What makes this such a good idea is that the oil pastel holds the chalk pastel in place somewhat. I like lines and clear delineation between spaces, so to draw this floral, I used black oil pastel to outline on black construction paper and soft pastel in the brightest colors to fill. I rubbed a soft layer of blue chalk into the background.
I used this method time after time in my summer drawing and painting workshops at MAC, and the results were always excellent.