I did what rtboswell says in post 3. I think you should definitely do it in 2 steps. One hot burn to get rid of manufacturing residues and then a seasoning burn with Pam or crisco. After that, cook some fatties!
Weber 22.5" Performer
Weber 22.5" One Touch Gold Kettle
Weber 18.5" One Touch Silver "Guinness" Kettle
Weber Genesis gasser
Blazin' Buttz BBQ Team