Restoring 1917 Bronze Plaques From Old Bridge

My company is restoring an old bridge on the Tennessee River. We have 3 large bronze plaques about 3' x 6' that need to be restored. They cannot be removed from the concrete. The lettering looks fair. How should we do this? Any suggestions.

Jerry Britton
Britton Bridge, LLC - Knoxville, Tennessee
2007

Try conservation OnLine webpages-that is job for professional metal conservator!Good luck!(http://palimpsest.stanford.edu/)

Goran Budija
- Cerovski vrh Croatia
2007

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