As others have said, get a quality microfiber cloth from the rag company for example. The ones from South Korea are some of the best in my opinion. Also, the ones from magicfiber.com are good and I use them on my glasses without any issues of scratching. Lastly, dust the speakers before applying any polish/scratch hider or you may increase the chance of the actual dust particles adding to the scratches.
Am I out of my mind? #obsessed
I have a pair of B&W 805d3 stand mount speakers. I dust them weekly with a microfiber cloth. From a few feet away they still look brand new but on closer examination they aren’t perfect. Tiny micro scratches and smudges. I had the thought of trying a polishing product or car wax to make them perfect again. Good idea or am I just #obsessed?