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4 members (SKB, Lloyd3, KDGJ, 1 invisible),
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Joined: Jan 2002
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Sidelock
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Sidelock
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Joined: Aug 2005
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Sidelock
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Sidelock
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Ken,
I'm going to try that - but I am starting with a polished, case-hardened gun, not a color case hardened piece. I'm going to experiment a bit on some small parts on the fore end.
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Joined: Feb 2004
Posts: 13,879 Likes: 15
Sidelock
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Sidelock
Joined: Feb 2004
Posts: 13,879 Likes: 15 |
Brent,
If it's that Miroku o/u, I think it's 4xxx series steel martensitically (thru) hardened to somewhere mid 30's to low 40's RC, and not case hardened. But, I could be wrong.
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Joined: Aug 2005
Posts: 1,698
Sidelock
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Sidelock
Joined: Aug 2005
Posts: 1,698 |
Yeti, it should still work. Might take a bit longer to get that grey look you are looking for. I have found soaking the parts in a "REALLY" dirty diesel crank case oil helps some. I believe it is the small amount of sulfuric acid that develops during use that's why I prefera oil that has been needing a change 4 or 5 cycles ago --- more acid build up. There is just enough acid to ever so lightly etch (yet leave a sheen) the surface & I believe the filthy oil tends to impregnate the pores of the steel some. Maybe this helps with the light grey color. FWIW, Ken
Ken Hurst
910-221-5288
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Joined: Aug 2005
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Sidelock
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Sidelock
Joined: Aug 2005
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Here's Chuck H's Greying recipe - a pass of rust blue then ferric chloride etch. It's just what I was shooting for, a soft grey. The metal was highly polished before starting. I think some of the old rust freckling shows back up after the etch, as it was hidden by the polishing. Not a big deal, just a 'note to self'. I cut the Radio Shack etchant by 50% with water.  
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