Thanks tautologies, The damage is a bit further up than the picture you show, right where the steering lines cross following a rotation before you spin the bar.
I have had one incident with the kite looping uncontrollably that I punched out from, but I did not notice damamge after this (and it is quite noticable damage, both when kiting and setting up). I first noticed the damage a few sessions ago and it appeared to get worse over the last couple of sessions.
My main question now is do I need to replace those lines, and if so what is the best/cheapest option? Do Ozone lines work on the Naish bar?
I will certainly try the wax trick on the existing lines if I keep them, or on the new lines.