Looks like some custom work done on that fender. Looks like there is plastic thats cracked and the only way to fix it is to grind it out and redo the whole thing
I can't bring up pic but if its just a fender it'll come out a lot better to remove and repair then spray. As opposed to try and repair and blend on the bike. Panels really not big enough.
Normally I would fill, fair and reshoot... However ... I've repaired a few things like your scar with a different approach ... I've painted filled and painted over with a different color ... sometimes I've been able to get away with a line ... but most of the time I've had to shot an entire area .. black gloss and silver work pretty well and if you mask off and reclear the whole thing it can turn out really nice ...