There are those that might say, it's a grill...it's meant to be cooked on. Those might be right, might be wrong. If it were me, considering it's probably dirty now anyways, do some huge cook on it. Document it, take photos, the whole nine yards. Then, give it the full cleanup and polish and retire it. I'm guessing you have other "everyday" grills to handle the cooking responsibilities. You are one lucky Westerner owner!