Buy Rusk Hair Styling Products - Rusk Deepshine Oil 8.0 oz. How-to-Use: For styling, thermal protection and frizz control, apply a small amount to damp hair and style. For finishing, apply a few drops to dry hair. For use during color service, add a maximum of 3 drops to haircolor mixture and process as usual. Will enhance shine and condition, and help seal the cuticle, reducing color washout during post service shampoo.