Help with cold bluing

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spara
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Help with cold bluing

Post by spara »

I found a new rear sight for my Tokarev and it came with the bluing stripped off. I drifted it on the slide to test it out and works just dandy. However, having a bright silver sight isn't great, so I decided to cold blue it. Watched a few youtube vids, bought a bottle of Birchwood Casey Perma Blue, prepped the sight by sanding it and degreased it, heated it up, then applied Perma Blue. Waited 30 seconds, quenched it with water and wiped it down. Did this multiple times and the sight doesn't get dark, except for a tiny part. Yes, it's definitely steel, a magnet sticks to it.

Here's what it looks like after many failed attempts.

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Any suggestions on what I'm doing wrong?

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Marlene
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Re: Help with cold bluing

Post by Marlene »

I never use heat with that stuff. Degrease well. Lots of coats.
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offensivename
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Re: Help with cold bluing

Post by offensivename »

I'd rust blue it for you when I do the mauser parts, no guarantee when that would be though.

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sig230
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Re: Help with cold bluing

Post by sig230 »

Also some bluing products work better on some metals than others.

Cold bluing solutions are relatively cheap so I tend to keep three or four different formulas on hand.
To be vintage it must be older than me! Coming to you from Deep South Texas!

kmatlow13
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Re: Help with cold bluing

Post by kmatlow13 »

Agree with sig230. I've had good success on east block steel with Oxpho-Blue Creme (best) and Formula 44/40 (fast, but not as durable).

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lurker
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Re: Help with cold bluing

Post by lurker »

black sharpie. so presidential.

damnitman
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Re: Help with cold bluing

Post by damnitman »

lurker wrote:
Thu Sep 10, 2020 11:05 pm
black sharpie. so presidential.
Car Engine paint. I have tried many different cold blue products and none of the results were anything to write home about.

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SubRosa
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Re: Help with cold bluing

Post by SubRosa »

I'd just pop it off again and heat it with a torch till it gets that blue color.

Maybe practice on some scrap steel first. Works amazingly well for parts that won't take chem blue.

SR
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Bisbee
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Re: Help with cold bluing

Post by Bisbee »

I second painting it w flat black enamel. You’re not going to get that shiny piece effectively dark with any cold blue kit. It’s a sight so it won’t get a lot of physical contact handling. Whatever sharp edges that gets rubbed off over time can be easily covered with sharpie or more paint.

Recommend you take off the sight before painting it.
"It is better to be violent, if there is violence in our hearts, than to put on the cloak of non-violence to cover impotence. There is hope for a violent man to become non-violent. There is no such hope for the impotent." -Gandhi

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