Hi Quintin,
have a look at the website of Vallejo paints: http://www.acrylicosvallejo.com/
and specifically at their guide: "Figure painting with Acrylics": http://www.ttfxmedia.com/vallejo/cgi-bin/_modelis.asp?p1=ing&p2=modelcolortecnicas
Also, Figure International (the magazine) has some articles on their site www.figureinternational.com which may be of help as well as their forum.
Good luck and lots of pleasure!
Jan Martin Wagenaar