Mark-
thanks for getting back to me!
I have the Bavarian book, it is called:
Die Helme der Koniglich Bayerischen Armee 1806-1918 by Walter Seibold and Gerd M. Schulz
great book, hardt to find but I highly recommend it!
Anyway, I see no referance to gold stars in that book either.
I think the best assumption is the silver wash wore off to the gold stars, but we may never know.
Thanks
James