You can see in one of the photo's that I used a small cutoff wheel. It allowed me to control the wheel and make a circular motion to etch the metal. I did that a few times, and made the etch deeper each time, finally cutting through the metal.

The large grinder is so powerful and heavy, I found myself cutting more off than I wanted, which is why I used the small cutoff wheel.

In the end, it does not matter that much since you will never see the bracket

I just wanted to make it look perty