One of the funnest things I bought in England last trip was nail polish which claims to give your nails the effect of leather. It comes in tan and black. Because I always love a polished look with an edge, I bought with the black kit.
The kit includes the leather effect polish, 4 small metal skulls, and nail glue to apply them. The only other supplies you will need is a nail file and a basecoat.
I always think that dark colors look best on short rounded nails.
File your nails to remove any tough edges.
Apply a thin clear basecoat.
Once the basecoat is dry, apply a thin layer of the leather effect polish.
Wait 2 minutes for the first coat to dry and re-apply another thin coat.
This is how the nails will look dry (the next day).
Apparently this polish kit is sold out in the States, but, I would recommend it for a fun Rock n' Roll glam nail effect.