Was looking for this earlier and had to go elsewhere to get it, so thought I'd up it as I haven't upped anything in a while, and someone might find it useful.
How to Paint Citadel Miniatures: Amazon.co.uk: Rick Priestly, David Cross, Dylan Owen, Adrian Wood, Nuala Kennedy: Books
http://uk.games-workshop.com/storefront/store.uk?do=Individual&code=60049999100&orignav=300810
http://rapidshare.com/files/152116054/How_To_Paint_Citadel_Miniatures.pdf