I'm very happy that you all appreciate my work, dear friends.
As David has noticed, my greatest attempt was rendering as well as possible the movie character and not an historical one, for example I have underlined the eyelash with an almost pure black to enance the fierce glance, in a historical one it could be too much, but not in this subject.
The elmet effect was achieved with a brush tapping with various metal shades from pure gold, silver, raw and burnt umber and black.
It's only a matter of trying and trying until reaching the desired effect.