Hey Greg,
I found this place in Ft. Worth that I'm going to have refinish my plates when the time comes. I bought my plates off Ebay, unissued, a couple of years ago but I think the paint, because of the age, is starting to get discolored spots in the off white background. This guy say he can duplicate the reflective paint as original also.
His prices are fair, $70 per plate, and the turnaround is about 3 weeks
Hope this helps.
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I know the voices aren't real, but they have some pretty cool ideas...