Ok I know I am going to be in the minority here, but if we are restoring cast iron why not bring it back to it's original beauty. Chuck's iron is very nice looking and if that is what the customer wants and that is what it takes to sell it then do it. Seasoned iron is a must if you is going to use it, but for display why not make it look like cast iron. Will says why not use spray paint. I know he was just kidding , but to me the look is just the same. Clean the iron your favorite way , warm it up and I apply a coat of mineral oil. It can be polished to a very nice looking cast iron finish..
Again do what you want, but I like my cast iron to look like cast iron. Dick