My snake is a butter banana but has a white belly. Still I think the scratsches are not unnoticeable.
The cage issues are hard for me to assess since I have really no idea on what materials he gets the scratches from.
The issue I had with the heat protecter mesh is not responsible for the belly scratches since there is nor way he gets his belly up there. That was a problem with the scratches on hid head but these have already started to heal pretty good.