Mixing watercolor and oils can create unique and interesting effects in your artwork. While watercolor typically uses transparent pigments and a water-based medium, oils are opaque and use oil or solvent as a medium. Combining the two mediums can result in beautiful textures and colors. To start, paint a watercolor wash as the base layer. Let it dry completely before applying oil paint on top. The watercolor will act as a resist, creating areas of transparency amidst the opaque oil paint. Alternatively, you can mix watercolor pigments with oil mediums to create a hybrid technique. Experiment with different combinations and layering techniques to achieve stunning results. Keep in mind that the drying times of watercolor and oil paints are significantly different, so take that into account when planning your artwork.