I have become hypnotized by painting up a Genestealer Cult kill team that I am considering slowly making a full army out of. The background I am going for with them is a sort of western United States a tightly knit hick clan of isolated miners, ranchers and laborers that live and work in an irradiated area shipping in their minerals and other resources to planetary colony. I think Rusted Claw is the best fit especially since much of my painting scheme already matches.
I am using my Space Hulk genestealers as inspiration for their skin and chitin which consists of light gray skin and dark gray chitin. However, for the cultists I try to mix in a fair amount of fair flesh that gives them still a gray palour that just doesn't pass for human. I am still not sure what direction I am going to go with the claws. For the cultists I have gone with bone, but I am thinking for the actual genestealers of going glossy black. My space hulk ones have silver claws, but I don't think that works as well for the genestealer cult as it looks less like Aliens and more like the cultists fit the genestealers with silvered weapons.
Note: these models were built for use in Kill Team and as such don't conform to Genestealer Cults squad limitations.