It was one of those weird things where I was reading The Two Towers and just got up to the bit where Frodo, Sam and Gollum meet Faramir and his rangers, so it was perfect timing to paint them. They're described as being wrapped in green cloaks with green masks etc. so they're painted in greens, browns and greys to blend in with the grey rocks and the like.
And now I have 30 primed and ready to go elves for my son's battle company (and friends) so that's probably going to be a big project!
The only difficulty so far has been in getting wood elves with spears. I don't really want to buy a box of 70 of them, but it's really hard to find any on eBay too. So for now he's just going to have to make do with Galadhrim warriors.