I'm only showing the front cover but there were 4 images that had the same treatment. The fourth image was straight side on and only a narrow strip of colour at the bottom. All black and white images, no sepia toning. The appropriate areas were masked off with transpaseal then airbrushed with Photo dye, gradually. This entailed spraying a couple of whiffs and letting dry. Doing it this way allowed the dye to stay on the surface of the print,whereas if I was to spray the colour in one blast, or alternatively wash the dye in, then I would be unable to knife the highlights to white of the most prominent raindrops. It was a delicate operation and I blunted a number of 10a scalpel blades in the process.