Seems like all the cool kids are doing this now, so I'll chuck in my WIP (procedural, VRay) too.
I still need to add the glossy flakes (it's kind of looking v. dry right now) and some dirt and stuff, and touch up that v. awk displacement map, but you know, not that bad for a couple of hours of lobbing things together. I'm loving all of the amazing Unreal shaders!
Welp, I think it still needs a ton more work. I'm still not that pleased with the SSS yet, there are parts where it's much too crusty & icy, and I think it's something to do with the transmission depth, but I can't really figure it out yet. Will keep having at it.