Hi Andrew.
This picture is really too small to copy or print so you will have to work on your original.
Wow. What a nasty one. Everything seems wrong with this.
The Green and Blue channels are bad
The magenta and yellow and black channels are bad.
The Lab Lightness channel is OK
There is too much blue in the shadows.
There are spots and marks all over
And on top of that this picture is really too small to work with.
Here is what I did for what it’s worth.
Levels to set black. White and mid points.
Duplicated the picture. Converted to Lab and repaired the marks in the lightness channel and sharpened it.
Dragged this layer back on top of the RGB image and set blending mode to Luminocity.
Layers set to colour to paint out colour casts.
Hue/Sat to adjust colours
Neat Image used selectively
Sharpened
That’s the basic idea.
This tutorial should help
http://retouchpro.com/tutorials/?m=show&id=206
I’m really not happy with my picture. But I’ll post it anyway. You should be able to get better results from a bigger picture.
Maybe try scanning it again to try to get more detail in the eyes.
Another way to go may be to change it to black and white.
Repair the damage and then colorize it
Hope this helps
Ken.