These guys make something that should help : https://jaxchemical.com/shop/jax-iron-steel-nickel-blackener/ I have not used the product for cast iron, but have used their bronze darkener to good...
Type: Posts; User: John E. Braun; Keyword(s):
These guys make something that should help : https://jaxchemical.com/shop/jax-iron-steel-nickel-blackener/ I have not used the product for cast iron, but have used their bronze darkener to good...