Chipless Repair

And, because the chip goes into the sink, it often disappears down the drain. So, there’s no stone to replace; there’s just the dinged edge.
Before CA (cyanoacrylate) glue was introduced to the stone industry, repairing these small cavities could be messy and time-consuming. If you didn’t hire the right guy for the job, they could be quite unsightly as well. Cardboard, glue, hardener, putty knives – not to mention fumes and a sticky mess – all made this an undesirable task.
Today, these repairs can take as little as two minutes, and be nearly impossible to detect. About $12-$15 worth of materials will allow you to repair 100 or more of these chips.
CA glue is essentially super glue in a dropper bottle, with an accelerator that comes in a pump or spray. It comes in viscosities from water-thin all the way up to a thick gel. It’s available from stone-supply catalogs (and even your local hobby shop).
Basically, you apply the glue to the area that’s damaged, and trowel it with a razor blade so there is a very thin layer on the surface that will be even with the repair. Then, spray the accelerator; the glue will set up almost instantly, and will not shrink. After you let it sit for approximately 30 seconds, wipe the area clean with a rag.
Next, take a fresh razor blade and hold it at a 90° angle – straight up and down – to the surface. Hold it firmly, so you allow only a small amount of flex, and scrape it smoothly back and forth over the glue.
The glue should come off in thin white shavings; work the glue down until it’s completely flush with the stone. If you didn’t apply enough to get the glue flush with the surface, you can apply another coat and repeat the shaving.
Finally, take a rag and wrap two layers of it around the tip of your finger. Wet the rag and dip it in some marble-polishing powder. Rub the compound over the repaired area very quickly and briefly.
The marble polishing powder has extremely fine abrasives that can polish the glue. You must be brief, because a long exposure to the powder can begin to affect the surrounding stone.
Clean up the area and inspect. When done properly even the person doing the repairs can have trouble locating it.