lube
I would melt it and put it threw a paint strainer a few times that should catch all the junk in it just do it slowly so not to get to much in the strainer it might clog up on you and what you have left you can use as lead flux Forest Punch
I would melt it and put it threw a paint strainer a few times that should catch all the junk in it just do it slowly so not to get to much in the strainer it might clog up on you and what you have left you can use as lead flux Forest Punch