I ordered some 3M Di-Noc Carbon Vinyl off eBay (~20 CDN Shipped) to wrap the top shell of my Mac. It turned out pretty good (I think) especially how the reflection from the pattern changes according to the lighting around it (unlike cheaper ones where it's just a printed pattern on a glossy sheet), close to how real carbon fibre would shine. The vinyl was pretty easy to work with. I took the top shell off (iFixit) so it's easier to cut the apple logo out and also wrap around the edges. Other than the tools to take the shell off, all you need is a hairdryer for the corners and a cutter blade to trim the excess material. The material has the woven texture on the surface. Anyways here are some pics from my iPhone.