the extreme highlighting: took a little practice, but I can do it pretty quick, now that I have a system. I have a mix of paint (I found myself without codex grey at some point, and had to mix some up using Fortress Grey and Chaos Black... the mix came out a little darker than Codex Grey, but I used it on all the CSMs, on both red, black and blue. And it's worked nicely.
That's my backlog Chaos of minis. So next update will probably come in a little while as I work on 4 more CSMs then move on to 6 Fallen DAs. I'll try and do a step by step as I go, as my system is relatively simple.
Future stuff on the menu that I haven't purchased yet: 4 Chaos Bikes, 6 Raptors, 8 FW Plaguemarines, Demon Prince, a Dreadnaught (whenever it drops)... and that leaves me 4 holes in my CSM carry case to fill with individual special characters.