IMHO, the HT Paint Citadel Models is really for beginners - Or it\'s all about getting armies on the table - it doesn\'t cover at all what is \"art\" painting like what Rackham does or Golden Demon-style painting achieves- I assume you aspire to something more than tabletop stuff ?? It\'s a decent book and I have a copy here in my lap but it I\'m too advanced for it ... (and I\'m barely a 7 painter)
If you want to IMPROVE your painting and you can already paint then I\'d suggest the monthly White Dwarf.
Specifically, the Eavy Metal articles - these are hands down the best I\'ve ever seen - they tell you exactly how they got specific effects and they give color recipes in GW paints so you can recreate it all at home. Any one issue may not be that useful but soon, after a few issues, you\'ll have several great recipes at your disposal. They nearly always demonstrate how to paint the new models but the colors are universally applicable.
For example, CMON\'s own tHaye (Tammy) wrote a great article on a Nurgle Chaos Lord in the new Issue 289. Fanastic! I don\'t care for Chaos at all but there are things in that that I had never thought of. The Flesh recipe on page 112 for example is neat:
Basecoat in Terracotta
Highlight it with Dwarf Flesh
Watered down Flesh Ink with some Red Ink over that.
Dwarf Flesh again on cheeks and nose follwed by a final highlight of Elf Flesh.
Lastly, she applied red, blue and purple inks into the recesses...
I wonder however if they get paid by how many tins they have to open - or if they are challenged to use every color in the range on every model ... ha! But at any rate, the end results are what matters and every month there\'s some great reference material in there ....