Good quality brake pads and pad. You can find videos on how to use it on YouTube. If you can work on wood with a disc sander, you can polish stone. The same principle. I only had to polish a few centimeters around the edge and the pads look like new. Amazing results and saved money by doing it myself (including the cut I made with a diamond blade on a table saw). You can also use them to repair chips and scratches.
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