Oil Pastels are one of a few versitile art supplies you can ever work with. Just about any medium intended for use with oil painting will work well with oil pastels. You can get similar effects of oil paintings using oil pastels on canvas or illustration hardboard.
Expressive strokes, scumbling, hatching, drawing and blended smooth passages are all possible using oil pastels dry.Sketching using Oil Pastels
Begin with sketching a drawing on sanded pastel paper, watercolor paper, illustration hardboard or your choice of surface.
Underpainting is also a useful technique with oil pastels. Adding a flat underpainting or wash under different areas eliminates the white flecks from white paper and creates a much more richer color.
Palettes or the page can be used to mix oil pastels. Blend them together to create smooth gradients.
Watersoluble oil pastels can create various opaque and transparent wet effects buy adding plain water. Heavier applications can be smoothed with a blend or wash.