looks enough with dirt to me, very nicely done. vary a bit in the colours to make it more interesting, in my opinion. btw the light at the front looks amaaazing:)
It is indeed enough dirt and yes, you should do them helmets in silver. It is good to see this coming to a finish, it's really a nice piece of work my friend =)
Thank's!Now it's only two things left to do (except the helmets). Painting the special weapon and the standard.