The button face if wood grain, it's the same wrap I did on my Istick. The 3M vinyl is really nice, the wood has a wood grain texture, the granite a stone type texture, so there not so slick to hold on to.
I cut the wrap a little a little big, stuck it on and then followed the profile with a utility knife holding the blade at about 45* so I could cut it back from the edge a little bit so hopefully it so 't get caught on stuff and peel off in a week.
I had the same issue. Removed the paint with some nail polish remover and knife and have a silver one now. Problem is some acetone got on the LCD and now its fogged up :l