JB weld, flex seal or full rebuild ?

Depends on how badly the bores are scored and what the requirement in clearance is between the Icon pistons and your present bore. IIRC, Icons are 2618 alloy forgings so they can run tighter than 4032 alloy. But usually the difference between hypereutectic and forgings of the same over size is significant enough to require re honing. So really, you’ll have to dismantle it and get it measured to know for sure.