I've used brass plates and printed circuit etching methods to do similar projects.
https://lh4.googleusercontent.com/-...9MHqyo/s1280/2012-12-25_13-38-12_809.jpg
https://lh3.googleusercontent.com/-...FbT0Os/s1280/2012-11-16_17-06-00_817.jpg

In this case you mask everything you want to be high, likely the letters and pattern and a border. Then everything else is etched away several thousandths of an inch. You can then either polish the high spots and leave the background as is or paint the whole thing and ever so gently sand the paint off the high spots.

I have an aluminum Roadranger shift tag that is of a very nice style but not quite correct for my model transmission. I will eventually make the necessary changes and make a new one on a brass sheet.

Grigg


1951 GMC 250 in the Project Journals
1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-