In the picture, the cracks on the mount are the things that look like scratches. Very fine, but definitely cracks in the paint. Just not sure if the tube underneath is also cracked. Seems like a strange place for that to happen. I'll keep an eye on it.
As for the metal, Blackstone suggested that it might just be "the new normal" for my engine. And I'd hate to start tearing it apart if that's the case.
I'll probably fly another 20 hours or so, change the oil, and see how it looks.