Looks good... but if you don't mind me asking, why is the scratches on the lower checks a reddish color? Also the green-blue on the back of the helmet looks alittle dark. What color are you using for this area?
You definitely have the shapes and placement of the scratches down, so on that end it looks stellar. However I have to echo what's been said about the colours - those red scratches should be gray (Reefer Gray to be specific), and the back should be a blue-green (RLM73). I don't know if you actually are colour blind or if that was a joke, but at the very least read the names of the paints you're using and you can't go wrong . You have the skills, so just touch up those two colours and it will look much better.