Make Yellow rust on cast iron

I am an artist looking for a chemist to collaborate with.  I an trying to create Yellow Rust on an old french cast iron fireplace insert.


Aside from vinegar, salt and hydrogen peroxide (that result in mostly red rust), is there a chemical that I can apply to bare cast iron to get Yellow Rust.  


Yellow Rust


Iron oxide-hydroxide FeO(OH)H2O (high moisture)


Yellow rust is present in metals that are found in large amounts of standing water. This type of rust is usually found in a solvated state, commonly found near sinks and bathtubs.


https://www.cwst.co.uk/types-of-rusting-and-how-metal-surface-treatment-can-help-prevent-oxidation/#:~:text=Iron%20oxide%2Dhydroxide%20FeO(OH,found%20near%20sinks%20and%20bathtubs.


