Cargo,
It is good when you say that the scar cannot ever be covered up 100%; that is a good dose of reality. My expectation is to reduce the contrast between the strip scar of the hair around it, realizing of course that the scar could still show in certain lighting/situations/etc. At this point I just want to cut my hair stubble-short and be at peace with the back of my head, eg.(tap a nap in the middle of the day, sleep at a hotel without rubbing dermatch all over it, a million other situations).