It appears that some grease had spilled over from the drip trays onto the bottom of the cabinet which doesn't look great, but probably helps keep the rust away. I'll keep my eyes open for an enamel lid too.Nice find! As far as the lid goes I would swap it with an enamel one....a redhead or even a black, blue, or green one would look nice. I'm hoping the cabinet is not badly rusted as that is the weak point of that grill. If it is then converting it to an open cart would look nice as well.