Have stripped many layers of paint off a victorian cast iron knocker. A very fine, intricate casting has emerged. Leaves, flowers etc. Am back to bare metal except that the surface remains oxidised. Rust-coloured. Would like to get back to shiny metal but the casting is too intricate to do this by physical abrasive means, at least in the nooks & crannies. Any suggestions, please?
Would it be possible to then apply a clear protective coat to allow the knocker to survive exterior use without corrosion? Is there any product that would do the job?
Jim