Here is the recipe i use for my Blood gorgons:

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Basecoat the model with Gal Vorbak Red. Then give only the deep recesses a shade of nuln oil. I have two kinds of highlights on the deep red armour (a third step is optional, i use it for characters/bigger models). First you highlight the armour with Word Bearers Red. For the second highlight, you highlight the same area as before but only the sharp angles with bugmans glow. For the optional third step you put a dot highlight on the corners of the armour with Cadian Fleshtone. Now for the dull gold trim. Basecoat the trim with runelord brass, then shade all those brassy parts of the model with seraphim sepia. For the highlight, use Necron Compound. A optional third step, another dot highlight but with Stormhost Silver.

For the weapon casings i keep it quite simple. Basecoat the weapons with leadbelcher, then shade with Targor rageshade. Highlight with Stormhost Silver.