Ricki, whatever you do, DO NOT only cover the problem areas with the glaze coat! Not sure if your bumps are due to bubbles or the texture of the spray paint, but for bubbles you need to sand the tops off. You will then have to pour another full thick coat, and be sure to use a torch. My husband had to torch ours for a full 1/2 hour. I had horrible bubbles with my first pour. With second pour, due to the torching, we now have a beautiful, smooth as glass finish. If your bumps are due to the texture, I still would sand with 600 grit to ensure your second coat is smooth.