I will be trying it soon with my Akuma custom. I plan on using the Smooth-On Smooth-Cast 45D. It should be soft enough to bend and rigid enough so that it doesn't tear. I doubt you'll find anything like Hot Toys quality in the material though because those are injected plastic whereas hobbyists are only afforded soft resins that are poured using silicone molds. But I think we can get close. I've seen some amazing work done on garage kits where soft resins are used and tinted.