I'm fighting a nagging headache that won't go away today, so I've not felt up to much, but I have started on the willow tree for the marsh project. I'm sort of cheating a bit with this, in that the armature is commercially made - it's a Hornby Skale Scenics one, and it's possibly a bit small in 28mm: I'd guess it scales to about a 20' high tree, and willows extend upwards of 40'.
This is basically done using the method I detailed in part 4, only without the rubberised horsehair: liberally spray with unscented hairspray (and I do mean liberally - especially on the thin willow armatures), dip in flock, repeat.
As to what it is?
Well, you'll just have to wait and see.