I will scrape some of it off, it looks like paint. At least that's exactly what paint does when it goes bad, so I would be surprised if it wasn't. If the new parts have a different finish though I'm going to have them replace all of them, no way I'll drive around with different looking trim.
This is off topic, but are they not making Tuxedo Black anymore? I saw a 12 limited when I was at the dealer and it was just plain old black. Fine with me, I like rare things!