Hi Flavio .
Is that material what they call Raffia ?
It could be dyed with strong tea or coffee before you wrap with it .
my only suggestion would be that you try to do the wrap in a pattern such as a 3 or 4 strand over and under weave ; I think it would look much more authentic .
Did you check the patterns in this thread ?
http://www.vikingsword.com/vb/showth...tive+ropecraft
Or even better :
http://www.folsoms.net/knots/turkshead.htm
I'm sure you can find instructions on making a simple Turks head pattern from Google .
Have fun .
Rick