I taped it the rectangle finned areas, then folded 600 grit paper and roughed up the cross sections. I used a satin enamal spray. No primer. Then I did the center section. Mine is a 66 piece . Still looks good with no peeling after 25yrs
Thanks Fishypete, good information. 25 years is a long time, its encouraging that it lasted that long, factory paint sure didn't. I may be overthinking the UV concern though, reality is my car will be garaged or covered 95% of the time.