Try scanning, I have scanned my Dad's medals, they came out very well. The platen on your scanner should be glass, so treat it with care, the thin metal should not scratch it but take care anyway.
Can you adjust the scan after it has been taken, e.g. contrast, brightness etc. It might be an idea to post the scan under picture restoration and see what the clever folk on there can do for you. I bet they would like the challenge.
I await yu results with interest.
Mike