McIntosh MA352 Mirror Finish Scratches

Since it's stainless steel, I'm wondering why you didn't just use windex, but anyhow, first world problem for sure. You could only make it better with an even finer abrasive polish than you already used. Maybe Simichrome?

I don't know, I'm definitely kicking myself. Thank you, I'll look into that. 

You'll probably need to find someone who specialises in metal polishing as polishing stainless steel to a mirror finish is a tricky technique to master involving lots of grades of abrasives and practice.

I don’t know if you will completely get them out, but I would try Flitz. Technique is everything. Apply with a soft foam or microfiber wax pads for cars and buff off with a microfiber towel. Straight lines only. This may minimize them to a point where you won’t notice if you’re not looking for them. Also, an acrylic car wax like Klasse might fill the micro scratches a bit making them harder to see. That’s probably the best you will do without going to a jeweler’s polishing wheel.