I recently got my block back from the machine shop, it hadn't been cleaned, so i took the task of cleaning it. I used a pressure washer and cleaned it thoroughly, and applied wd40 immediately after i stopped spraying water. I scrubbed it with dish soap, rinsed and did the same thing. After this i noticed some weird marks in the freshly machined cylinders and deck. They seem to be some sort of weird water marks that don't come off, but it doesn't look like rust. I have used every chemical imaginable and the marks do not go away. You have to shine the light just right to be able to see them in the bores, if you move the light a different way they seem to disappear. I had a hard time taking a picture because it either doesn't show up or appears 10x worse than it looks in person, but heres the best i got. You cannot feel these marks at all, even when scratching the surface with a nail, there's nothing. Any idea what this is/how it was caused/if i need to worry about it?
Here you can see the marks on the block deck:
And here you can see the marks in the cylinder:
Here you can see the marks on the block deck:

And here you can see the marks in the cylinder:
