Polymer clay works very well for doing such things. I used almost the same technique for my Silver Tower models' bases.
15 stormcast liberators with upgraded Shields. The 16th storm cast for this current section of the commission is on a priming sheet. That particular one is a banner bearer, and then as I said above we have the 15 liberators here.
i see my phrasing was off. I currently have a commission project. these are for @NIGHTBRINGER 's viewing pleasure rather than his in practice.