I came across this very recent short thread on the Terra Plana Facebook page:
"Bryon Rossi: The Franklin's are the best 3 season boot I've ever owned. Do you recommend treating them with some sort of leather conditioner or protection?
"Terra Plana A water proofing spray for leather could further protect against cosmetic water damage but they have been water proofed."
Also, Earl Gray Toe put a post into the "Minimalist Snow Boots" thread on this forum, saying that Franklins does the job - see 1st and 3rd posts in this thread:
Earl Gray Toe and jurado hall have also written positive reviews on this boot: http://www.toesalad.com/node/79
I find all these really helpful, as a barefoot-type waterproof boot is something that I really have to get.