As promised a while back here's a tutorial on how I painted the black on Abaddon.
Note that this is for a simulated high reflective black, and not everyone likes this particular look for black
I used VMA 71.005 intermediate blue, VMA 71.075 sand, VMC 70.950 black and Secret weapon washes W002 heavy body black.
1. Basecoat model VMC black.
2. First highlights are airbrushed on with Intermediate grey, making sure to focus on the area where the light would pool.
3. Next hightlight is 1/5 VMC sand to VMC intermediate blue. Again focus on where the light would pool, and make sure to leave part of the previous highlight.
4. Next highlight is roughly 2/5 VMC sand to VMC intermediate blue. By this stage you'll start to think "what am I doing, this doesn't look black at all..." Which is why step 5 is needed
5.To re-define the black I use the wash from secret weapon which leaves a slightly shiny surface, which is really great, any black wash with some gloss varnish added should suffice though. Now you blend back the highlights to define them and make some contrast.
6. This is the final stage and also the detail stage of the model. Using a brush touch up any areas that needs to be a bit darker with the black wash, also use it to blackline all the rivets and panel lines. Then using a 1/1 mix of VMC sand to VMC intermediate blue highlight all the edges. If you prefer add a further highlight of 2/1 VMC sand to VMC intermediate blue to make the edges of the "light pools" stand out a bit more.
Add all other details like the red, gold and steel detail in this case. (the model isn't complete as I didn't have the time
atm.)
Hope this is useful to some of you guys