Citadel paints have released a new batch of technical colours. Duncan Rhodes demonstrates how to use these colours on Games Workshops website (and also on YouTube).
One thing I would mention about some of these techniques is that you may find your end result unsatisfying - especially if you are going for the Blood Effect and Rust effect.
Allow me to explain why......
Blood For the Blood God colour has been designed to have a runny fresh spilled blood effect and dries as such. This is great if your model has just freshly slaughtered his enemy as the blood would be fresh and wet. However, our models are static and more often than not they spend most of the game out of assault. This leads to the viewer looking and thinking "something is not quit right here". It is natural and perfectly right to be thinking that.
Where this colour really comes into its own is when you are making a diorama. This is a scene made to tell a story. You will see some amazing work at Golden Daemon held annually around the world. This captures a snapshot of the action at that moment in time. A freshly wounded soldier, a vampire holding aloft a just decapitated head to his army, or a knight impaling his enemy at the end of his lance. This is very believable because your mind is picturing the moment before, the now and then immediately after. Try using this colour technique for moments like this and you will get a very satisfying end result.
Nihilakh Oxide and Typhus Corrosion
These two colours can be used for verdigris effects and streaks of oil. If you combine them you can get an excellent oily rusty time worn effect. Try to keep Nihilakh oxide for copper, brass and bronze based colours. This is because these metals form coloured oxides of a green blue spectrum. Use it on Steel and it loses it's impact.
Typhus corrosion is excellent on any metals, especially vehicles. Around wheel arches, rivets, nuts and bolts and mechanical parts that would require oil to avoid seizure will make your model look really well used.
Ryza Rust . Be careful with this effect. Use a thin amount and you will get a nice starting amount of rust effect. AS if the metal is not too old but the weather is starting to take it's toll. If you want more worn look, then after it has dried - apply a few thin layers of Typhus corrosion. This will give the impression of further weathering.
A word of warning. If you go too heavy with these layers you will make the model look unrealistic and cartoon effected. Why- you ask?
Well, despite thinking surely more layer and heavy coating will make it look more weather worn and corroded it has the opposite effect instead.
Heavy rust and corrosion is a result of oxidisation of the metals. Basically the metal is being turned into a rough metal oxide which builds up on the top layers. The more the corrosion takes effect, the more the metal takes on a a flaked appearance. In other words you need texture.
This can be added by first using a dark texture paint from the citadel range (any will do). Next paint it black and then colour it Leadbelcher (the paint has been worn away so no need to put the colour scheme over it). Alternatively you can PVA glue some sprinkles of sand or resin dust from the basing kits and paint over it.
Next you add your layers of Ryza rust and Typhus Corrosion and now you will have a very weather worn heavy rust effect.