A Weber barbecue does not require seasoning. Despite being porcelain-coated, the grates are composed of cast iron. Food won't stick to the grates because of the porcelain coating; therefore, seasoning is unnecessary. Weber grills only need to be seasoned if they are extremely ancient models, and since they are extremely old, this most likely happened a long time ago. You won't have to season a brand-new Weber grill, so buy one.