Initials in concrete can be cute, but if you don't want them there, they are a blemish on your concrete. Luckily, there are ways to remove initials from concrete. Just take a look at these steps:
1. Catch it while it's wet.
The easiest way to remove unwanted concrete carvings is if you catch them while the concrete is still wet. If you have just poured concrete, make sure to check it periodically as it dries. That way, if a passerby etches his initials into the concrete, you will see them while they are still fresh.
To get rid of it, simply smooth it over with a trowel. If there is a swirled pattern in the concrete, you will also need to use a broom to recreate those swirls. If the concrete is almost dry, try spraying water on the initials to moisten the concrete so that you can smooth them out.
2. Cut it out.
If you find the initials too late or if you buy a home and there are initials carved into the concrete, you will need to cut them out. If you have a circular saw, you can buy a concrete cutting blade for it. For small tasks, the two options are corundum and diamond blades. Alternatively, you may hire a concrete cutter.
Once you have the cutter, begin to cut through the concrete. Don't use pressure to push the blade into the concrete. Instead, allow the blade to break through the concrete at its own pace. Be prepared to cut through the concrete slowly -- the blade may only cut through a small layer at a time. Don't worry about making the cut straight. If you leave the edges jagged, it will be easier for the patching compound to work.
3. Patch it.
Once you have removed the offending bit of concrete with your concrete cutters, it's time to fill the hole. First, clear away all of the loose debris. Use a broom, and then, power wash the hole to make sure everything is gone.
It is okay to leave a little moisture in the hole as the concrete patch has water in it as well. However, there shouldn't be standing water in the hole as that will dilute the strength of the patching concrete. Finally, pour the patching material into the hole, and smooth it with a trowel until it is flat.
For more tips on removing initials or other unwanted carvings from concrete, contact a concrete professional.