hmm.. maybe yes, maybe no. i believe you can do this through editing armors and weapons on your item_db.txt
Example:
on Armors
2301,Cotton_Shirt,Cotton Shirt,5,10,,100,,10,,0,0xFFFFFFFF,7,2,16,,0,1,0,{ bonus bMaxHP,50*getrefine(); bonus bMaxSP,50*getrefine(); },{},{}
on Weapons
1101,Sword,Sword,4,100,,500,25,,1,3,0x000654E3,7,2,2,1,2,1,2,{ bonus bAtk,30*getrefine(); bonus bMatk,30*getrefine(); },{},{}
hope i helped you :3