I like the feel of an edge that has had a few licks on a lead strop. Have made a couple now, both out of roo leather.
The second one I sanded the leather with 1000 grit and seems to work better.
I think most here were exposed to a lot of lead in their life time from petrol, paint etc. The list goes on. Still occasionally have to deal with it anyway because it was used on nails for roofing here to form a seal on the corrugated iron. Not bothered.
Handle with care and minimise risk, clean blade thoroughly before shave etc.