I have those masts as well with no marks like that on them.
Is that damage from the bottom cam?
Either the cam is not seated correctly, or there is too much cam pressure. Both are easily fixed.
In the meantime, I would try glassing over the worn area, then sand it back level.
Isonic 97 2013
JP Speed 50 2014
Severne Reflex 4 7.0,6.2,5.6