In 2019 this card was given to my 7 (at the time) year old cousin at his birthday. Apparently he has been taking it to school a lot and it got covered in scratches. Also note the corners have clearly touched the floor a few times too.
A good 1-1.5 hrs of polishing layer, this is the result. *Note, it took about 10 min to clear off the majority of the scratches but I wanted to see if i could remove the deepest ones I highlighted given enough patience. Here is the result, zoom in for full detail
Wowza. This is really good information - thanks for the before/after pictures! It almost looks like even if a slab doesn’t have scratches, if you want to give it a quick ‘refresh’ (for your own display, a show, etc.) that a little dab of PlastX might be just the thing.