I've had my bull for a little over a year, either under the BBQ cover or under an outdoor cover -- never directly exposed to rain. Today, I noticed that a few streaks of rust had developed on the front below the lid. There was never any obvious scratches or trauma to this area, but something must have happened. Anyone have any suggestions for a remedy? I imagine a scotch pad to remove the rust, but any suggestions for sealing it or something to prevent the rust from coming back? Thanks for any advice.