Razzgirl, first off you should know that the use of urine to brown, and patina metal was a quite common practice, and is still used in Amish, and Mennonite communities. So there's no reason to be upset about a common practice. Second, Scooter, is Dr. Jim Whisker, and if he visited your ancestor, it pretty much happened. It's good you can distinguish between the original, and copies of the locks. keep up the research on the Sutter clan.
Bill