You can revert bound weapons and armor back to unidentified weapons and armor. But all enchanted values will be reset, so be careful!
Revert D-grade item from bound status to unidentified status Revert C-grade item from bound status to unidentified status Revert B-grade item from bound status to unidentified status Revert A-grade item from bound status to unidentified status Revert S-grade item from bound status to unidentified status Revert R-grade item from bound status to unidentified status Revert R95-grade item from bound status to unidentified status Revert R99-grade item from bound status to unidentified status