A question for the technotypes on the list. I'm trying to find a reference(s) dealing with the metal finishing process "Bower-Barff". I have found reference to it in a late 19th century building spec. that I have been using for research. Unfortunately, I can't find anything written on this process. Thanking you in advance. Susan L. Maltby, Conservator [log in to unmask] (416) 998-921-2877