I'd also consider a tiny spot of toothpaste (rubbed around a bit) and a rinse. It may sound like I'm being facetious, but I'm completely serious; toothpaste is kind of like "very mild Flitz" and sometimes it works nicely.
If you do any cleaning or polishing make sure you go in the same direction as those grind lines only or youll really scratch it up bad. its the 1 thing i hate about Reates satin finish and wont buy any more.
It is not only Reate but every satin grind with those lines. I had a sebbie brand new in satin grind, scratched up while cuting some boxes. Then, tried to touch up those scratches with fine grid sandpaper and ended up mirror polishing because other scratches are developing and the satin was getting more and more polished.
If you’re not satisfied, just send it back as is without any tinkering if it’s not a keeper. If it is, go nuts with it and make it your own.