rebuid

Hi there, I’m new here and I was reading some forums in damaged pistons and was wondering if I can get you guys to look at them with the pictures provided to let me know how this might of happened? Also if I rebuilt it what are my chances this will happen again? I currently have a 97 XP seadoo,

I just subscribed to this forum today and overall new to the Seadoo wrenching world I am a car/truck mechanic by trade and have rebuilt tons of engines for them. I have also done motorcycle engine/transmission rebuilds. Ill start off by thanking everyone for their help and patients with this...