*Note: below you may see a strange tool option set; this is the tool I use for smudging and blurring in the hard shadows to make it appear almost gradient-like. Step 3| I start smudging my hard shadows, conciously remembering where exactly to blur my shadows. Always keep in mind that the darkest part of the shadow is where it starts, and NOT where it ends. That is a principle I simply apply here. Then, once I'm satisfied with the shadowing, I take a small eraser brush and erase the edges where you would normally see highlighting and 'reflective' light. Again, do not overdo this feature and only add it to areas where the light source depicts in the illustration. Take your time and do not rush. Think of every action you preform. Step 4| My favorite part; here I add blotches of white in regions that require a metallic/liquid silver sheen. Blotch these in sparingly and along the frames of the darkest and boldest shadows. DO NOT add too much of the thick white highlights to areas that have no shadow crease.