September 21, 2011
My name is Tom, known as HD116 at Home Depot's How to Community found at the site above. I saw your question, and am quite familiar with the Red series grills from Charbroil.
The answer to your question is Copper, but my experience has been that the porcelain coated cast griddles that are featured in the Red Grill will hold up to steel. I have the same griddles on my Charbroil Commercial Series grill that is now over 6 years old and have used a "Brush Hawg" stainless steel brush on it for all six years and have had no issue. It is a very stiff steel brush. My experience with copper brushes is that the bristles break and end up in your food.
Hope that helps.
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