This is what GW says about one of its latest products:
Liquid Green Stuff is the ideal tool for filling in small gaps on a miniature. Because it is water soluble you can use a normal Citadel Paint Brush to apply it (just make sure you wash the brush afterwards). The Liquid Green Stuff will then set in place, filling the gap neatly and efficiently.
This pot contains 12ml of Citadel Liquid Green Stuff
First thing that came to my mind when I saw "Liquid Green Stuff" was: "Yeah, right. So this is your answer for Finecast." However, I gave this a try and decided to do a little review.
I have read several articles about this stuff and some of them said that Liquid Green Stuff is non-toxic. GW doesn't say that on their homepage, so this might be wrong. Can't tell you more about this aspect but I try not to lick the brush after using it. :)
Consistency:
Liquid Green Stuff looks and feels like almost dry GW-colour. The one that is not totally lost and can be reactivated by adding a bit of water. You could also compare it to liquid rubber or hot cheese on a pizza, whatever you prefer. When you look very close, you can see sort of a sandy surface but that disappears after drying. There is a very faint smell that I can't describe in detail, but nothing to worry about. As I mentioned before, I didn't taste it.
Shrinking:
I added a small strip to a ruler, exactly 1 cm. I then waited for about 15 minutes and looked again, without noticing any shrinking concerning the breadth. What I instantly noticed was the fact, that the Liquid Green Stuff became very flat. So as the original GW-text says, this seems quite good to fill gaps, bubbles or remove mold lines. As this was a very quick test, I wouldn't definitely say that it doesn't shrink at all, it just didn't until now (one hour went by).
Filling gaps:
I looked for something with a visible gap and found nothing.^^ Then I went reeeaaaalllyyy deep into my box of shameand found the legs of the Nurgle-Lord-thingy from 40k. As you can see on the pics, some work has to be done between the leg and the torso. Lets see how it worked.
I was a bit disappointed at this stage. I waited for about 15 minutes, until the Liquid Green Stuff looked totally dry. Well, it was not. I have to test how long it really takes until it is dry and can be sanded, 15 minuted are not enough. However, this is the result. The gap is filled, thats what I wanted. The consistency at this stage is still like rubber.
Smoothen flat surfaces:
For me, this is the real strength of Liquid Green Stuff. I used a lot of other puttys to get surfaces smooth but none of them worked perfectly for me. This product does.
First a I added a bit of water to the surface, then I applied a first thin layer of the putty. After 5 minutes, I applied a second layer and waited. Using water really makes this stuff easier to work with, I have to try different mixtures to get a satisfying result. After about 20 minutes I sanded the surface and got a really smooth result. The best thing is, you don't have to wait ages until the putty is dry.
Using it to sculpt:
No way, don't even try it.
Conclusion:
Liquid Green Stuff is worth the money, especially compared to other puttys used for the same reason. Don't use it right from the pot, it will disappoint you. Dilluting with water brings nice results. After drying, it doesn't get rock-hard.
If you have any questions or remarks, let me know.
Chris