TechDiamondTools Diamond Polishing Paste Kit — 3 Grits (4000, 8000, 50000) | USA Made | Oil-Based Syringes | Progressive Polishing Set for Metal, Glass, Gemstone, Knife, Jewelry | 10% Diamond Powder

I had a deep scratch in my mineral crystal, deep enough to cast a shadow on the dial of my watch. It's an inexpensive enough watch that I figured I'd risk trying to get it out rather than sending it for glass replacement. The 3000,5000,14000 grit worked perfectly. I used a dremel tool with the polishing wheel and worked up to the high grit, applying moderate pressure in small circular patterns. DO NOT TAPE YOUR DIAL TO SECTION OFF THE SCRATCH. I did that initially and it caused a "step" from where the tape ended and the compound was contacting the glass. Instead, keep the entire face of the watch uncovered and apply pressure localized at the blemish and fan out applying less pressure as you get further away. With this method I was able to get rid of the scratch and step caused be the lower grit with tape. It took about 30 minutes in total, initially it seems like it wasn't going to work but if you keep at it, it works great. I don't know how well ot would work applying by hand, but with the dremel this was a breeze.

The product works. Many light scuffs and a light scratch on my watch. 20 minutes of each paste by hand got rid of all the scuffs and eased the appearance of the scratch. Works well.

The 4000, 8000, and 50000 combo worked perfectly on my Epoxy project. The original finish had a few bubbles at the top. I sanded first with 50, 250, 1000, 3000, 5000, and 10000 grit sandpaper. Then, I used a wool buffing pad and a medium to high-speed drill with the 4000, 8000, and 50000 grit diamond polish compound. I switched out pads for all 3 grit polishes. I think the 8000 was good, but the 50000 gave it a clear glass look. The only con is that the portions are small, but my project was small, so it was just enough. I definitely recommend this for small Epoxy projects.

My Seiko received 3 small parallel scratches on its Hardlex crystal. I have restored lots of vintage mineral crystal and acrylic crystals using Polywatch and a Dremel, but Hardlex is really hard. Started with the 14k grit, and then 5k and with my Dremel at low speed with a new wool pad, and within 15 minutes I noticed a difference. I’ve spent a few hours over a few days and the scratches are almost gone. I figure another hour with the 14k grit and it’ll be as good as new. Highly recommend for Hardlex.

This buffing compound has worked exceptionally well. I have used it twice so far and it performed just as expected. My first use was on a bathroom faucet. There was some sloppy casting and finishing work on a small section of the faucet that my wife just finallly got tired of looking at. She wanted to replace it. Instead, I started with the 1,050 grit and a dremel with buffing attachment to make quick work of cleaning up the physical blemishes and matching the rest of the area. I moved to 1,500 grit with the tool and a new attachment to refine the finish. Then I used the 3,000 grit and a new attachment to take it to the final finish. Lastly, I used a rag, finger and the 3,000 grit to remove the pattern left by the tool and make everything uniform. It looks great, my wife is pleased and I don’t have to replace the fixture I installed not all that long ago. I also used it to clean up the scratched resin “crystal” of my work watch. All the beatings had left the watch “crystal” scratched and it was difficult to see the small digital display at the bottom of the analog watch face. Using a rag I started with the 1,050 grit and worked my way to the 3,000 grit. The “crystal” is once again shiny and I can see the digital display perfectly well. I didn’t get rid of the deepest gouges but I’m unconcerned as my goal was just to be able to see the display. It took me, maybe, a total of 15 minutes between getting everything out, buffing and rinsing. If I had been more concerned with trying to get rid of more scratches it may have been possible by spending more time but the goal was accomplished.