I'm a topical guy myself and I have several progress threads on various ESB helmets I've painted. If you search for threads started by me in the helmet forum, I'm sure they'll pop up. But the short version goes:
1) Lighter color on back panels
2) Dark blue-green on back panels
3) PO Green on dome and lower cheeks
4) Black-green on upper cheeks
5) Red for mandibles/band/ear areas
6) Silver and gray damage all over the helmet
All the helmets I've painted so far have had separate ear pieces, so I've just done them after the main helmet is done.