is there a way to cure mangled brain scars?

[Kywilo]

biosculptor pod? or do i need healing mech serum?

[Soth]

bioscultpor pod with the 4000 research improvement (requires 2 glitterworld medice) will fix it.

[Mountaineer]

Luciferium works, too. Of course then you have to maintain a supply of Luciferium, so it's not as good as a healing mech serum or biosculptor. Better than nothing if it's your only available option, though.