Are these spots rust?
 

I went to perform round 2 of my engine rebuild deep clean and found these spots on my center housing. I am specifically referring to the area by the step wear.

I coated the faces with wd40 after the first cleaning so I don't know what happened here. My best guess is that there was already some pitting that I missed somehow.

Since I'm having a hard time locating a new replacement version, I wanted to make sure that I am correct that this needs to be r we replaced now. Thanks for your help.

https://cimg2.ibsrv.net/gimg/www.rx7...c54bf1cfd0.jpg
https://cimg4.ibsrv.net/gimg/www.rx7...9d5def612b.jpg

I would not use them..