polishing & sealing cast iron

[Restorer]

I am restoring two beautiful 19th century cast iron tables.
I am de-rusting them with Rust Gel, then polishing up to a high shine.
Can anyone recommend (a) suitable metal polish and (b) a non-toxic clear metal lacquer to seal them with afterwards?
As I will be using them indoors every day, I don't want to use oil to prevent rusting, and most lacquers seem to be toxic.
Thanks

 

[Burnerman]

What - are you polishing the iron up to a natural metal finish, or a glossy painted one? I would have thought that the free carbon particles found in cast iron would make a natural finish rather difficult......?
In the good old days we used to use a laquer product called 'Ercolene' - I think, but I'm not sure how durable it is. John

 

[Restorer]

yes, I am polishing up to bare metal - it looks gorgeous, but you need to lacquer it as it eventually rusts again
Ercolene is no longer available I think, but I will keep checking
as I am doing all this indoors I need to watch out for toxicity
Many thanks

 

[Lower]

Its not a lacquer, but you could try renaissance wax.