I've finished the plates and got them installed on my Jeep.
I spent WAAAAY too much time doing bodywork to the plates to straighten them: dent removal, sanding, filler, primer, glaze work, crazy masking, and painting.
I also milled a set of "50" 3 tab tags to put into the black field. The year tags are 0.010" aluminum which was easy enough to machine up in a CNC machine using a picture from the internet for the "font". I painted the year tags the correct green color.
I bought glass reflective beads to coat a wet clear coat (which is apparently how they coated the plates back in the day). It turns out the glass beads kind of turn the whole plate into a "matte" finish which I actually don't like. I preferred the finish before I did that treatment. But I do want them to look "stock" so I can get the DMV to give them a "thumbs up" to use them on my vehicle.
But, the DMV has been closed for two months, and I was tired of waiting to get them inspected. so I just said forget it, I'm putting them onto my Jeep. I'm pleased with the old school look. I took a nice drive around today which was nice because we've had a horrible spring so far....cold, snow, and very late awakening of flowers and tree buds.
Maybe when things get better I'll actually bring them to the DMV to get official, but I don't think anyone will hassle me.
Stay safe!
Dave