Exhaust Manifold Restoration

[Dicky]

To all you restoration shops & members;

What is the best method to treat cast iron exhaust
manifolds to prevent rust and maintain a raw cast look,
(without burning off) [img]<<GRAEMLIN_URL>>/dunno.gif[/img]

Thanks in advance, Dicky [img]<<GRAEMLIN_URL>>/flag.gif[/img]