It is impossible, IMO, to tell the keenness or the lack of it from photos. I would try doing 10 x strokes on the 8k first then strop and shave test. You can always go to the lower grits if that doesn't work. If the 8 doesn't get it I would go to the 5 and back to the 8. If you already had the 10k I would suggest starting there but that is a month away.