Place a piece of masking tape on the pedestal guard at the location where the hole will be drilled. Mark the planned hole location onto the tape with a pen.
Place the tip of a center punch on the mark. Hit the rear of the punch firmly with a hammer to create a small indentation in the metal.
Place the tip of your drill on the indentation. Use a bit that's smaller than your planned hole. Start drilling, using a very slow speed and applying steady pressure. As the bit works into the metal you can increase the speed.
Replace the drill bit with a larger bit when the hole is complete. Place the tip on the existing hole and drill slowly into the metal. As the bit catches and the hole expands, increase the speed of the drill until the hole is completed.