Refining Weapons and Accessories
To refine a piece of equipment, you must first find a duplicate of that equipment (Example: To refine the Pure Love staff, you need to obtain another Pure Love staff.) Refining weapons improves their weapon bonus by a certain percent. Refinement does not allow you further level up a piece of equipment, but provides a boost in other areas.
When refining accessories, the same system applies in that you need to have the same named accessory to perform the refinement. Refining accessories will improve some of the stats for that accessory.
Make sure that you look at the information window when performing refinement, so that you know exactly which stats will improve.