Final image, defensive hardware installed. I will usually do a contrast, hue, overall impact adjustment after completing the drawing. The metal body, I thought, was overall too bluish, so I warmed up the scene lighting and main brushed steel surfaces. You'll notice it took a while to arrive at a wheel design after a few temporary cut and paste jobs in process. I didn't want to use photo-scrap for the final image, so I designed my own wheels at the end, somewhat inspired by the ducted fan type seen on Porsche 936, Audi IMSA GTO, etc.