>>9423009Here you can see some joints and other parts molds.
-One pointer I can give is that you must use boiling water. If it's not boiling the blue stuff doesn't get fully soft.
-After you take out the blue stuff from the boiling water you have some minutes to make the bottom part of the mold. After that it will become too stiff to work with. You need to wait until that part is cold and hard before making the top part of the mold.
-I also use a flat screwdriver to spread the blue stuff when it's soft and make sure it wraps around the part properly.
-When I've added the top part and both mold parts are hard I cut them (before separating the parts) into a squarish shape, with that it's easy to make them match later when casting a piece.
-Apply green stuff to the bottom and top parts by separate (on parts like the leg for example). I use a flat screwdriver dipped in water to spread the green stuff in each mold part. Then join them and squish the molds to get rid of the excess.
-I've tried adding holes to let the green stuff exit. I think that helps on some parts, check the chest part mold in the attached image. I do this after the mold is hard with a hand drill.
-On simple flat parts like the joint at the bottom left of the image (the one that has green stuff on the mold, and I think the joint in your image would apply for this too) you can make the bottom mold hold most of the volume of the part you want to cast. Then you push the top part of the mold on top of it to get the details of the surface, no need to apply green stuff to both the top and bottom by separate here. You can also add some water drops to the top part of the mold so you can remove the top mold part and check if the green stuff copy looks good (water stops the top from sticking to the green stuff).