It is normal for a carbon steerer to have visible parting lines from the mold as you say. However, that fork is pretty poor quality. It looks like there is an alloy insert in the crown, so I suspect that the steerer has been bonded on after the main section of forks was molded. Nothing inherently wrong with that and could explain the rough surface.
It also looks slightly concave where the crown race should sit, so I can't see how the crown race will sit concentrically to the steerer.
Is it an aftermarket fork?
Thanks for the explanation, not aftermarket it came with the frameset, its Dolans full carbon road fork, I havent tried fitting the crown race so can't comment on how it would sit but that doesn’t sound great.
It is normal for a carbon steerer to have visible parting lines from the mold as you say. However, that fork is pretty poor quality. It looks like there is an alloy insert in the crown, so I suspect that the steerer has been bonded on after the main section of forks was molded. Nothing inherently wrong with that and could explain the rough surface.
It also looks slightly concave where the crown race should sit, so I can't see how the crown race will sit concentrically to the steerer.
Is it an aftermarket fork?