William, if i were you i would go back to the thread i linked for you and work this out step by step. It seems you are in a bit of a rush to work this blade and i think it might be to your benefit to slow down and attack this situation more methodically. I agree with Rick that pineapple juice is a great acidic liquid to use. You really MUST remove ALL of the rust before you can even think about restoring the pamor pattern of this blade. I would let this puppy soak for a while (a few days) frequently brushing the surface with an old toothbrush. Once this is done you can start to figure out how to stain it. But truthfully, the arsenic and lime mixture (warangan) is the only thing that will restore the proper color to the iron. Other chemicals will raise the pamor, but it won't be quite right. There are people who can do this work for you if you don't want to mess with such sustances.
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