Revitalizing dry transfer lettering

Hi there
Is there any way to revitalize old dry transfer lettering?
I have some sets that refuse to give up their letters no matter how hard I rub it with a ball point pen.
Is there hope or should I just pitch them?
Steve
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On Sunday, July 27, 2014 10:11:49 PM UTC-4, Steve Guthrie wrote:

Pitch them. The transfer coating has degraded.
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