I have just starated a new project http://www.overunity.com/index.php?topic=6278.0;topicseen and as a part of which, I am looking for a substance called Autonite.
In my searches I came across the following book which hints that Autonite/Autunite may have been used as a coating
for some tubes.
http://openlibrary.org/b/OL7083303M
May be there are some dots to be joined.