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Not sure what that black oxide is, but I'm guessing it's a decarb layer from heat treating. My CG FBM blade has a pretty thick layer of it (well... like paper thick, but it's a bear to remove) and I've about given up trying to take it off in one go. I say it's a probably a decarb layer because it isn't as stainless as normal infi is, it will rust rather easily but it isn't deep, just surface staining. Hitting it with my scotchbrite wheel turned it a silvery grey color, but you can tell from the few spots where bright white infi is peeking though that it's not been removed. Hitting it with gun blue will blacken the grey layer, white infi is unaffected.
you Could Have Put Your Other Ash In That Pic, You Know The one
I Think I Would Sand The Sar If I Were You, Then Again I'm Not And Would Probobally Leave It.
Thanks For The Pics:thumbup:
ive seen this on a few busses ive stripped. all the tan or desert camo ones ive owned had this black "layer" underneath the coating.
this is the first time ive seen it under a coating other than tan.
i think ill leave it. at least for now. i dont have a belt sander or any other tools to remove it efficiently anyway.
well, i started with the mothers. good god my elbows hurt!!!
looking like a comp finish. its not quite as dull as in the pics.
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