Makes me wonder ...... since it is from a well known maker I assume the spine is plenty thick enough for the width of the blade to give proper geometry for honing ..... what is it 17 degrees or somewhere in that neighborhood ? Is it a wide bevel without a lot of meat ? Assume it is a wedge, 1/2 hollow, being a custom ? I'd probably put the coticule back in the drawer and maybe get the trusty old 1k chosera out and do light circles until the chips are gone and progress from there ...... but not being on the spot, or seeing the razor firsthand, I really don't know for sure. Someone will be along who knows for sure.