Why not buy a roll of green mineral felt and use that?
Done lots of lead work of all types, don't like it never have. I found it easier to lead weld or "burn" as some say. Bossing okay but you have got to have patience. I think one of the lead companies do publish a guide as to how to bos which may help you. Its like laying carpet except its heavy, the hardest part being bossing the up stand against the wall if you are abutting a rear wall that is and the roll end.
You will probably also need tin snips, chase wedge, setting in stick, bending stick, step turn, flat dresser, lead mallet and tallow beside other things.
A piece of waste lead to dress through.
You can also use lock welting preferably double lock welts if the pitch allows, and in some places standing seams. It all depends. The lead sheet association website is okay.