Can these terrace slabs still be saved? 2 years old!

Hello dear people,

we are redesigning our garden and since I can't spend much money at the moment, we will probably buy good used patio slabs. Now, I was offered the ones from the picture below, I hope the upload works.

According to the seller's information, these are expensive brand slabs that are not even 2 years old. As you can see, the coating looks terrible. A coating is not a must on a patio slab anyway, many don’t have one at all. That's why my question: Can the remaining coating be easily removed, perhaps mechanically by sanding or with a chemical? I only care that the surface looks nice again, whether with or without coating. As it looks in the picture, it is of course disgusting.

Thanks for your tips!

Due to the dismantling, transport, and reinstallation, the panels will probably look even worse. Although I cannot necessarily see any damage in the picture now.

After 2 years, the plates look like this. Regrinding only makes it worse.

Is this a defective coating or a desired design? I cannot distinguish it in the picture.

I don't see any damage in the picture. I believe this irregular alternation between light and dark is simply the design of the panels and not a defect. The glossy coating still looks completely undamaged on the right side of the picture.

Or moisture that cannot escape!