Liquid Green is Awsome

OK, so with the now much maligned finecast shift this year GW have came up with the great plan of letting you buy tools to fix their mistakes. Nice work guys!
However one of these new release is in my opinion amazing.

Liquid Green Stuff.

It's...green!

I've used this to do a couple of projects so far, most notably the Doom of Malan'tai. It's a fantastic product, easy to use. Far easier to get into tight gaps with a brush rather than smoothing tool.
The filler is also waters soluble, allowing it to run into gaps and with a bit of light brush work it can be blended out to mesh seamlessly with the surface of your model.

The price (£2.30 for 12ml) is very reasonable too.
Regular kneadite green stuff is still an excellent option for sculpting and filling but this stuff adds a level of fine control that is invaluable.