John Coffer demonstrated a glass rod approach to sensitizing paper for albumen prints this past summer at his the wet plate workshop I did.
He took a glass rod, and with a blow torch bent it into roughly an "L" shape. Then he took the paper, and bent the sides up so the silver nitrate wouldn't spill off and spread it around with the rod. He apparently had been having some success with it until our workshop. In the end, one or two of our prints had some uneven splotches, so I think he was going to go back to the proverbial drawing board on that technique.