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Tom Wesenberg · 07-17-2016, 09:29 PM

I use G-96 gun blueing to darken mine. It does a great job, and as soon as I finish with the blueing I use ATF to oil them and keep the rust away.

I never had luck with Birchwood-Casey, but a guy in our club has made some nice specialty Model A tooling and used BC to darken the parts, and they came out perfect. I must have had a bad jar of the liquid.

07-17-2016, 09:29 PM	#2
Tom Wesenberg Senior Member Join Date: May 2010 Location: Mpls, MN Posts: 27,582	Re: Darkening original engine bolts... I use G-96 gun blueing to darken mine. It does a great job, and as soon as I finish with the blueing I use ATF to oil them and keep the rust away. I never had luck with Birchwood-Casey, but a guy in our club has made some nice specialty Model A tooling and used BC to darken the parts, and they came out perfect. I must have had a bad jar of the liquid.