CF really only has the advantage when it comes to weight. As pointed out, the carbon fibres are fireproof, but the plastic matrix isn't. As far as durability goes, you're better off with steel parts. CF has a nasty habit of just shattering, where metal parts bend. If you want to paint CF, then have at it. Most people leave it unpainted for bragging rights, but if we are all honest, how much does the paint really weigh once it dries?

Peace be with you