Thanks for the comments everyone. Yes, my white work is the hardest side of the painting at the minute. I'm planning on trying to black line some of the white with an ultrafine marker. Might make them look a bit cartoony though.
Looking forward to painting the remainder. Expect that standard tacticals will take no time at all based on a black spray, black wash, highlight, eyes and chest eagles. Not much white to do so thats an hour or 2 saved ;)
I'll pop back and show you how things are going later in Oct.