You could try to look for information on this guy: http://www.worth1000.com/artists/deralt http://www.worth1000.com/artists/deralt He started doing photo retou

You could try to look for information on this guy: http://www.worth1000.com/artists/deralt http://www.worth1000.com/artists/deralt He started doing photo retouching in the 1950s. After he retired he went on to make some of the best photoshops I've ever seen. He was then in his 70s if I remember correctly. He made some posts about how they did it back then, so if there's a way to search deeply in worth1000s forum history it will be there. These posts were made in 2004-2005 I'd think.