I made some progress in the Stormtalon painting, with the the first highlights application and symbols painting .

Two symbols are present: that of the Dark Angels, as well as the RavenWing, both painted in the Doom Angels' colors.



I used the following:
  - Black undercoat
  - base Orkhide Shade
  - highlights Rotting Flesh

  Unfortunately, all these colours are no longer available. Having tried the Caliban Green, it is absolutely not what can replace the good old Orkhide Shade: too much bright (and colorfull) !
By contrast, Nurgling Green seems a good solution to replace the old Rotting Flesh.