Hi Wayne , I have even run into problems getting one (yes I sin) particular keris blade even clean enough for staining . I washed it with every available solvent from acetone to paint stripper , long soaks , strong detergent afterward . Then I would put it in my oven to warm it for staining and it still reeked of sandalwood oil , even after repeated efforts . The blade seemed to be impregnated through and through with the stuff .
I have tried Liver of sulpher (get out your gas mask!) on blades with no success . I think I've also used Muriatic , FECL , most anything I could find that was readily available . It will be interesting to see what your results will be .
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