Sorry but I have one more question. In the adjustment layers the last one you're supposed to do is a brown one. There is no brown on his armor so did you mean the reddish color? And is the other brown supposed to be a dirt like brown?
if you type in brown into the HTML bar, it will come up with an option of the brown specified by the people who make gimp. Thats the one I used. I also chose th brownish colour from his coif thing, behind and around his head...Glad i could help!
'tis defiantly the colour I used...if u dont like it, look for another colour adn experiment, its hard to get things exactly the same because u would have done things slightly differently even if u tryed your best to follow it (e.g when smudging the render, the galaxy brushes etc.)
just try and experiment with it...if it doesn't look right then undo it. This is one of the many things you will learn over time. Sorry my solutions where not of much help, i can't think of anything else.
this could because of many reasons firstly: Make sure you are using the darker colour as the fg colour, u might get a different result coz you are using a different coloured render, or i dno if u are still stuck, then reply!