I have a B17 I got for $25, it was not bad, oldish, a bit curled on the sides and saggy.
Hoping for some drastic results I trussed up the curling with a towel and dunked it in screaming hot 185 degree water we have going to our washer.
Turns out I left it in a bit to long, it came out a bit shrunk, great shape, cheese grater, alligator skin, weather check like surface AND yep hard as rock, not just Brooks hard as rock.
And still so after numerous soakings with various potions, Its kind of cool and it may look so on the right bike but don't think it will be a rider.
I may get after it with Huberds, maybe.