Here's a great cover illustration by Brett Ewins. I always loved Brett's Judge Anderson. This was for The Best of 2000AD Monthly #60 - Sept 1990.
There wasn't much of a budget for the monthly reprint titles in the Command Module back then, so I used to patch some of the covers together using the black film from the cmyk separations of the original issue. These were kept in the cavernous Fleetway archives. I'd then print up some pmt's (photo-mechanical transfers) and colour them myself.
Because a pmt is essentially photographic paper, I experimented on this by using photo retouching dyes which produced amazingly vivid colours. The only down-side was that they were particularly tricky to use and mistakes could not be easily rectified the way they can with paint. After I'd coloured her, Anderson was cut-out with a trusty scalpel and stuck onto an acetate overlay. I then specified the colours for the background image when it went to the repro house. I think the background characters were a deep maroon on the printed issue.
For more of Brett's work, check out The Art of Brett Ewins, Edited by Alan McKenzie and published by Air Pirate Press, right here...