I'm going solely off their video on their website. They state their coated with a color and finished either glossy or satin. These caps are included in that video in which they state their "Coated with real gold or silver". So, I'm going to go on a whim here and assume its not in fact "real gold or silver" (bare metal), Instead; A special paint or coating option with same finish options. It just seem "sus" to me that a "gold plated full size keycap set" would only set me back $300. Or that these caps ever sold for the presented $500..
The website/video I'm referring: https://awekeys.com/pages/awekeys-full-metal-keycap-set