Finally got round to finishing this helmet, here's what i used and the order i painted it, pics to follow:
ESB 100% layered Humbrol colour list:
1. white primer
2. off white base coat 147
3. buff gently with 0000 wire wool
4. mask entire helmet except L/H ear
5. spray red 60 on L/H ear
6. liquid mask red damage on L/H ear
7. spray grey 28 on L/H ear
8. remove red liquid mask
9. liquid mask red and grey damage on L/H ear
10. mix greens 78+159, then spray on L/H ear
11. remove all masking from helmet
12. mask L/H ear
13. liquid mask off white on helmet as per ref pics
14. spray silver 11onto helmet
15. Liquid mask silver and off white damage all over helmet
16. spray grey 79 all over helmet, spray grey 140 onto mandibles and trim to lighten slightly
17. remove liquid mask, lightly buff with 000 wire wool
18. masking tape whole helmet except mandibles/trim
19. Liquid mask silver and grey areas on mandibles/trim
20. spray purple (73+104 approx. 2:3 ratio) onto mandibles and trim
21. remove silver/grey liquid mask on mandibles and trim
22. liquid mask silver, grey and purple areas on mandibles and trim
23. spray red 73 onto mandibles and trim
24. remove liquid mask on mandibles and trim, lightly buff with 0000 wire wool
25. mask mandibles and trim
26. liquid mask silver and grey on upper cheeks then spray black 33.
27. remove mask on dome and lower cheeks then mask upper cheeks
28. liquid mask silver and grey damage on dome and lower cheeks
29. spray green 78 on dome and lower cheeks, lightly buff with 0000 wire wool, mask helmet except back panels
30. liquid mask silver and grey on back panels, spray beige, 28+103
31. remove liquid mask on back panels
32. mask silver, grey and beige on back panels ,spray green ,76+96
33. remove liquid mask from back panels
34. mask kill stripes (tape and liquid), 154 fade to 82
35. dent powder burn, 33+72 and a bit of 62
also around edge of back and lower cheeks, very lightly
36. liquid mask detail on R/H ear spray sand 93
37. scuff marks between dent and kill stripes satin black 85, use old fine brush cut to a stump
38. masking tape and liquid mask R/H ear decal, spray white 34
39. masking tape white arc on R/H ear decal, spray satin black 85
40. brighter red detail on R/H upper mandible area masked off seperately red 60 darkened slightly with red 73
41. grime in arrows, around ears and on top of mandible/ dome join, 93 mixed thin with white spirit
42. yellow glue blobs on back and side of dome, windsor and newton ink sunshine yellow, apply in layers with silicone brush
43. spray brown 62 fine/coarse splatter on R/H side of helmet and R/H ear and splatter beige 103 onto mandibles as per reference pics
44. hand cut ear decals from masking tape, apply satin black 85 with silicone brush
45. seal entire helmet with 3-4 thin coats of satin cote
46. have a cup of tea and admire your work...