Call me naive but I don't see the point of a spring loaded face. :\
It could easily be metal or plastic but, if it is metal, I'd say that the whole thing is metal with a paint or plastic coating and they didn't bother to coat the thread because that's the part thats going to get worn away. So coating/covering it would be a bit pointless.
God knows about a gimmick though. I'm doubtful that the face is related to the track but I have no real reasoning behind that......just don't think they'd release a track that relies on a certain type of face. :\
It could easily be metal or plastic but, if it is metal, I'd say that the whole thing is metal with a paint or plastic coating and they didn't bother to coat the thread because that's the part thats going to get worn away. So coating/covering it would be a bit pointless.
God knows about a gimmick though. I'm doubtful that the face is related to the track but I have no real reasoning behind that......just don't think they'd release a track that relies on a certain type of face. :\