I was a bit short of Light Missile figures for my Halfling Dragon Rampant warband so I did some conversions with Greenstuff.
These are Copplestone Adventureres but not very warlike so I changed the staffs into staff-slings. The challenge with Greenstuff is to avoid making the detail too big and clumsy for the scale of the figures, so I've learnt to use as little Greenstuff as possible.
These were two unarmed boys from the Foundry Viking Villagers pack. I needed some wire armatures for the slings but couldn't find any wire thin enough. Eventually I straightened out some 'Bambi' staples. The difficult part was modelling the feet. They do look big in the photo!
These conversions are fairly crude but they're the best I can do and good enough, I hope, for one-off figures. I remain in awe of professional sculptors who achieve such good detail, proportions and a natural look.