I've been messaging back and forth with the seller, he's done his homework on these wheels. Weight comes in 7 or so pounds under the weight of the same aluminum wheel, and they passed the vinegar test.....they're magnesium. They have been treated with an oil penetrate that I'm unfamiliar with and it results in a sheen similar to semi-gloss. The machined alum. areas were sanded and polished. Not something I would have done, but it will all fade in time.
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