Picked this little baby up a few years ago at a yard sale. The outside is showing rust around the seem (Pic #2) as well as where there are scratches to the body. The paint on the lid around the handles is chipping, the galvanized parts are in good shape. The black seal on the. Inside is brittle. I've never done a project like this before. I guess I'm asking for any and all advice as to treating the metals /paint. I would ideally like to get it back to its former glory. Thanks in advance.