Get someone to save you a bit of tobacco ash....
buy some neatsfoot oil.....
mix and rub after going over the sling with some sandpaper of various grits...
go out to your dirty charcoal grill with some gloves and get some grease and get to work....
wipe on...wipe off....
I've been aging...
I knew very little about the fire bombing of Tokyo until I read this book.....To The White Sea by James Dickey....it was an eye opener...my grandfather had been in North Africa, Sicily, and Italy...he'd been sent home from Italy spring of 1945 for a "break" and was delivering mail at Fort Knox...