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- - 4340 chromoly steel -polish (http://986forum.com/forums/performance-technical-chat/74202-4340-chromoly-steel-polish.html)

jaykay

12-19-2018 05:10 PM

4340 chromoly steel -polish

Any metallurgy experts on here?

Can the "black" surface of 4340 chromoly steel be polished to a gunmetal gray shine with a dremel?

gabedrummin

12-20-2018 08:30 AM

Sure that's the scale from heat treat under that is shiny metal you only need elbow grease to expose it .

jaykay

12-22-2018 04:00 PM

Thanks man that is what I wanted to hear.....wasn't sure how deep the scale / discolouration went.

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