I recently purchased a Weber Q3200 gas grill. I came to find that it had a porcelain coated cast iron grill grate, which I am unfamiliar with. I have always had plain old cast iron. There are a lot of conflicting posts on the internet as to how you should clean a porcelain coated cast iron grill grate. Does anybody out there now how to do this? My best guess would be to burn it off, let it cool down, and then scrub it with a stiff nylon bristle brush to avoid degrading the porcelain coating. Your thoughts?