I use aged planer shavings to flux my melt. After planning material that has been stored dry for some time, I plane it and put the shavings in open plastic pails for using as flux material. I usually leave them in the heated shop for several weeks before using them. Have done this for several years with no incident. Today I added some to the melt in my pot and started to spoon the edges of the pot to clean it off a bit. Some of the shaving got submersed as they often do but this time the reaction was a bit violent. lead was flying everywhere. Fortunately I did not get but a few small pieces on my neck and shirt. Could have been a lot worse. I think I will let the shaving char and dry a bit before any spooning is done in the future.