I have had good results using Oxpho Blue. What works best for me is having the metal slightly warmed, and making sure the metal is ABSOLUTELY free of oil. Using surgical gloves will prevent transfering of you body oil. I use denatured alcohol as a degreaser after the final cleaning. 4 or 5 applications will give you pretty good results. Make sure you give the metal a good rubbing with fine steel wool between applications. It will darken with each application. Finish with a good quality gun oil.
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