I'm considering getting myself a pair of C&J Tetbury chukkas in brown antique nubuck: Mmmm. I am, however, unfamiliar with C&J nubuck - does anyone have a pair of shoes made in this type of leather? How does it hold up over time? Any unattractive creasing? Also, in the pictures, this type of nubuck looks very similar to calf leather. Does it polish up well?