[Ron Ramirez]

+1, yes, please do share.

Here's what I have done to "age" a polished escutcheon:

I spray it with Mohawk Extra Dark Walnut toning lacquer, let dry, then lightly polish only the highlights. Then, I go over it again with clear lacquer to protect it. This gives escutcheons such as the early brass 70 and 90 escutcheons an outstanding appearance where only the "SUPER HETERODYNE 7 (or 9)" and "PHILCO" along with the other highlights are bright, while the rest is dark.