I'm in the process of a M725 driver/passenger seat restoration and I recently bought a pair of surplus OD seat bottom canvas covers on ebay that had a tag showing they were made back in the mid 1970's. - and they arrived and looked great and will fit the seats perfectly, but they were coated with a strong smelling waterproofing compound?? that leaves your fingers brown and oily looking when you touch them.

Not sure if anyone has had a similar experience with these? Can you launder that stuff out of them?
Or maybe I just need to make sure that I only wear my brown pants when ever I sit on the seats?

Bryce