Durability of carbon fibre?

I’m just wondering how durable the carbon fibre monocoque is? Will it be more or less resistant to scratching than plastic, aluminium, glass or diamond? The screen is Gorilla glass and so has some level of protection from scratching, but does the carbon fibre scratch very easily or would I be unlucky to scratch it in normal usage? If I put my keys or some coins in the same pocket as the Carbon 1 MkII would they scratch it or would I have to drop it to damage it?

If the carbon fibre is scratched, how would the scratch look? Does it have a black pigment all the way through, so that a scratch or scuff would be black on black or does it show white/grey on black?