Home Misc Video In this great video by Airbrush Asylum, you can learn how to create a cool skull design on your Bell Rogue Helmet chin guard–step by step! Use a water-based post sanding cleaner such as KC20 and a clean rag to rub the chin guard dry and get the surface nice and clean. Spray on a nice even coat of adhesion promoter. Leave it to dry for at least 20 minutes. Airbrush directly on the chin guard. Do your skull design free-hand. Add shape and detail as you go. The airbrush strokes do not have to be perfect, especially with this design. Add shape and refine edges with black paint. Apply shadows and shading to create a smoother, more three-dimensional look. Add white again to brighten the area and add highlights and cracks. Adding white can help to refine your shapes as well. Gradually build and do numerous coats. Do a final coat of black to add more texture and detail. This will enhance the three-dimensional look. Be sure to keep the paint thin and mix with reducer. Add any finishing touches and enjoy your new chin guard!