looking good smoke.
looks like you need to work on the eyes a bit more I see alot of bumps and you want those really nice n smooth, trust me, any imperfection your going to be staring at and it get's mighty distracting.
Also, when your looking for imperfections, grab a strong flashlight, hold it near parallel with the helmet surface your looking at, this will make the pits and such just scream out at you, which point grab a marker of some sort and circle them so you can find them later to fix. I used to do this with car body work.