You’ve ever tried manipulating Space Marine legs? If you have then you know how many small gaps and holes that appear everywhere, they aren’t precisely beautiful… So in order to help all of you who are having (or thinking about having) a go at repositioning SM legs (or arms) I thought that I may just as well give you some advice and warn you of possible problems. I will however only cover the green-stuffing part in this tutorial. I use only basic techniques, nothing advanced here (since I'm not that good with green stuff myself), if you are a seasoned green-stuffer you probably don’t even need to read this.
What you need (or rather; what I used):

- Games Workshop sculpting tool
- Green stuff
- A model in (desperate) need of green stuff
- Some water (for your convenience preferably in a small cup or jar)
Step 1:
Ugh, look at that ugly gap!

Notice that the parts are pinned together (using pieces from a paperclip), I recommend that you pin all the leg pieces in place or they might brake when you are handling them while green stuffing.
First of all mix some green stuff (no need to bother trying to mix up precisely as much as you need, it’s impossible, you’ll end up with either too much or too little. One of the many mysteries of this hobby) and apply it to the gap:


Now try to make it a bit more even, shape it so that it bulges slightly outwards, don’t make a flat surface. Use the sculpting tool, remember to dip it in water then and then (otherwise the green stuff will stick to your tool, you don’t want that).


Step 2 (final):
Now start making the recesses using the end of the sculpting tool that’s kind of spoon-shaped. Don’t drag the sculpting tool in the green stuff, instead gently push it into the green stuff and make the lines by “stabbing” the green stuff (this gives you more control, and it gives a better result). It’s hard to explain but I hope that you are following me at least a bit.


Step 3 (if it should happen…)
Well, while making the arm (found below) this happened:

Luckily it’s easily fixed by repeating step two where needed, just push your sculpting tool in the rivets.