Cerakote could be better - Aero Precision AR15 XL Stripped Upper Receiver

The cerakote looks nice and feels smooth on the outside, but the texture of the inside surface where the bolt carrier rides is pretty rough. Some commenters on Practical Machinist recommend sanding the inside of these with fine grit sandpaper, but I hate to have to do that to a brand new part that's supposed to be finished. Other people recommend just shooting it, but they don't mention how abrasive the cerakote is likely to be to the bolt carrier. Haven't decided whether I'm going to try to sand the interior cerakote down or just return it.