The "scratches" (streaks) are not uncommon on many motors before the rings seat in.
No worry there. they are from limited ring contact before seating. You cannot feel them with a fingernail.
If you run the engine too softly during break-in they can become permanent.
I was shocked the first time I saw them in a $1000 Nikasil rebuild with 5 minutes run.
They were gone after 30 minutes run.
The casting/plating pits are not impressive.
I had none in mine, but really, in the long run they will be inconsequential in a $100 engine.
Can you identify what the "trash" is Jeff?
I suspect it might be light break-in oil sediment from an electric motor run up after assembly.
Steve