I'd use a plastic-dip like product. Lots of YouTubes on doing it. There are flat and now shinier similar coatings out too. If you don't like it - i peels right off but is pretty durable.
Believe those CMC wheels are 7x15" - those Vintage ones are only 4.5 or 5.5 width. Ouch they are $230+ each too.
There was someone here looking to buy the old CMC chrome/gold wheels? CIP is having a sale on faux Fuchs. Seems they are < $150 each shipped -- plus you'd need new 5 bolt Porsche rotors/drums and center caps.
CLASSIC VW - VW WHEELS - TIRES - 911 STYLE REPLICA WHEELS (cip1.com)