Chris, you probably don't need loads of unhelpful comments ....but, that looks to me like untreated (no primer) metal that's been sprayed with a can of satin black. If it was me (I'm a picky 2009 Roadster owner) I would make a real stink until "they" (MMC or dealer) rectify or better replace.
Peter 2009 3-litre Roadster "Ivor", royal ivory / green
