Trying to get a copy of the TSB for the Lexus 2010 IS 350C for Nav screen blemish issue.
I bought this used, but under warranty, and that was one of the first things I noticed, but I didn't make a big deal of it. The touch screen is permanently damaged and unclean-able due to finger oils. Not sure why they didn't use a better product, like gorilla glass (I guess it's a safety hazard).
I found it at a couple of links, but I'm cheap and don't feel like paying $26 for it.