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englishman_ca, Oil Blackening ??

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Shamu View Drop Down
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    Posted: April 07 2019 at 6:21am
I recently bought this A.J.Parker No 9 rear sight.


Its mechanically very nice but cosmetically challenged, particularly the bluing.
The chewed screws are being replaced by the seller.

Here's my plan.
Dismantle & de grease,
Soak in Evap-o-rust overnight,
This will remove all rust & all bluing.
Rinse well dry with hot hair dryer.
I'm thinking of buffing the bright surfaces with very fine abrasives too.

Now I'm thinking of bluing the parts that were originally dark-colored, but I'm wondering about oil blackening after reading your posts on the subject.

I have a toaster oven which I'm planning on using for heating & then oil quenching, Its plenty big enough for small parts like this in fact I bought it for just such a purpose! I have a few questions if I may.
Do you see any horrible pitfall I've missed out?
Can I use new synthetic oil or must it be petroleum based, must it be used?

My main concern is retaining the spring nature of the rear part.

I have both liquid & paste type cold bluing chemicals as well, so I could do a combination if needed.

Don't shoot till you see the whites of their thighs. (Unofficial motto of the Royal Air Force)
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Honkytonk Quote  Post ReplyReply Direct Link To This Post Posted: April 07 2019 at 8:25am
My thoughts are it should be regular oil as I'm guessing that process uses the carbon in the oil.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Honkytonk Quote  Post ReplyReply Direct Link To This Post Posted: April 07 2019 at 8:25am
Also, would you polish up the shiny part with the numbers? 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Shamu Quote  Post ReplyReply Direct Link To This Post Posted: April 07 2019 at 11:11am
I'm thinking I might. It will depend on how deply the numbers are cut down.
The Evap-o-rust leaves a nice grayish tone so I'm going to see how well it goes.
My thoughts are blue the main casting, the rear spring, the knobs & their shafts (That will include the eyepiece, not shown, & leave the rest not "in the white" but close to it as that was the original setup. Maybe depending on the numbers blue them & polish it back somewhat to leave the numbers blackened but with a silver/grey background.
There seems to be some pitting there so I'll look more closely when it arrives.
Don't shoot till you see the whites of their thighs. (Unofficial motto of the Royal Air Force)
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Post Options Post Options   Thanks (0) Thanks(0)   Quote smerdon42 Quote  Post ReplyReply Direct Link To This Post Posted: April 07 2019 at 12:55pm
Shame let me know how you go I was looking to redo mine as well ,  now have a central sight coming for my 1917 lithgow target tribute rifle I am doing .
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Shamu Quote  Post ReplyReply Direct Link To This Post Posted: April 07 2019 at 4:36pm
Will do.
Don't shoot till you see the whites of their thighs. (Unofficial motto of the Royal Air Force)
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