We are going to start doing rework of Lead Free BGA's. Have always used flux for SN/Pb boards/BGA's with good results. Can flux be used fro lead free as well? Boards were originally assembled using lead free paste and components. Hence, the BGA we will need to rework has lead free balls. A co-worker suggests we use solder paste because of the higher melting point of BGA balls. Please advise.