Black Dog
Makin' Beer.
Would these methods work on a rusty cast iron kettle i just got off ebay for £0.99 p?.
Put a wire wheel on your drill and get all the thick rust and goop off it, then use oven cleaner and soak it to clean the rest off. You may need to use the oven cleaner two or three times to get everything, rinsing and drying the pan between each application. You're goal is to have shiny bare metal to start seasoning.