Removing fine scratch marks from VPI plinth

You're all forgetting the cloth used can cause as much damage as you're trying to remove. Quality microfiber is the best, followed by 100% cotton. Probably better to use the cotton with the plastic polish, as it is more agressive and then remove it with microfiber. Whatever you do, avoid paper towels and polyester/cotton blends.

High-end auto detailing sites like Properautocare.com carry pretty much all the stuff you need. They also have nice stuff for your car.

Keep in mind, I highly doubt you can remove any but the absoulute lightest and finest marks by hand. Removing scratches requires removing material from the surface of the plinth and that isn't happening by hand. At least not with any amount of pressure you would dare put on it. What you are doing is smoothing out the surface and perhaps the very top edge of the scratch and filling it with some polish, which makes it harder for the scratches to catch the light and make themselves visible. Just put a little polish on it and play records. And don't catch that stylus with a microfiber cloth!