Hey there Toney Macaroni, just bought the very same setup this past weekend off of CL in about the same shape. I think it is the old Genisis silver b or c. These were about $500.00 new and it is a Weber so even old it is still better than many new grills you will find.
I bought mine for cooking pizza only. I use my Genisis S quite a bit and was getting smoky flavor on pizza from past cooks even though I burn it off and clean grates before every cook and in general keep it pretty clean.
Just as you did a pressure wash, a little Rustoleum and a new homemade side table and this thing will live on.