Originally posted by milesy get those sort of figures?
Just look on the web (youtube) for tutorials on neutralize color or remove color cast, etc.
Bear in mind that color correction of skin tones isn't the same as color correction for landscapes or product shots; skin tones have specific color values and some variation is to be found if the subject is a child or an adult caucasian, asian, black, etc.
Also, inaccurate skin tones may be desired; the goal, rather than accurate skin tone, should be the desired skin tone.
A fool thinks himself to be wise, but a wise man knows himself to be a fool. William Shakespeare