You can try the myriad fixes for removing scratches on plastic eye glass lenses and the like .(youtube)

   You can try polishing em out with Future or even Brasso ( iI've seenit work) (remove the excess Future with Windex      ,it's gonna depend on the plastic but if they're hosed you got nothing to lose

  Other than that you could vacuum form a new one if you really want .

    Always a joy to discover mangled parts  ;D