Have a friend in the roofing business, and he saved me about 25-30 roof boots (nice sooooffft lead) with the promise of more to come. (free )
Most of these have a roll looking crimp where the pipe shaft meets the flashing, but some have what appears to be bright silver solder at the seam. Is this possibly lead/tin solder wipe? And what would be the way to separate this (if possible) before I melt these down?