Corasian

I am currently painting my MLC v3 and I have been having difficulty sanding the area under the visor of the helmet after painting. I was thinking is there a trick to sanding these areas?

I was wondering what modifications the does the Red Kap coveralls require. From what I can see in the pictures there does not seem to be suede patches, Butt Flap, Elastics and the collar will need to be modified. Would I be correct in thinking I would need to modify/adding all this?