Color Case Hardened Patina Shield 45

ScaryWoody

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"This is my pistol. There are many like it, but this one is mine." Except I don't like that mine looks like all the others.

I have coach gun that I was working with the other day. It's just a plain old gun like every other. I was doing research on coach guns and the ones I was drawn to were color case hardened. It gave it that extra touch and made it look more appealing, at least to me.

Further research took me to the process of color case hardening which is rather expensive and well, hard. In looking further I came across a cold color hardening process that uses chemical instead of charcoal and heat. Also, it works on stainless steels.

I thought I would give it a shot with my Shield 45 and make it look different. I figured I'd try it on a small area just in case I hated it.

First step is baring the stainless and polishing it up. The process itself is much like cold bluing. But of course, the Shield has a stainless steel slide.

I taped off the parts I didn't want sanded and went to work. It took about an hour or so of sanding. I used 280 grit, 500 and down to 1200. I then used the wife's nail polisher block. That makes metal and woods sparkly shiny. Shhhh, don't tell her.

Once the areas were clear I used some de-greaser and some acetone to remove any oils left.

The Stainless F/X (2, 4 ounces bottles , $58 shipped) has a bottle of metal prep. This is a very mild solution, very low acid content that etches the metal. The separate bottle of Patina solution actually colors the metal.

I carefully applied the metal prep with a sponge. Then applied the patina. The whole process takes about a minute. Once satisfied with the result you spray with water that neutralizes the process. I did a few different applications on each side until I achieved a desirable look.

The coloring is microns thick and will scratch and wear with time. Pretty much the same as any metal coating.

It's hard to see in the pictures but the result is a multi layered mix of blues, browns, goldish and purple. It blends well with the balance of the slide that I left in the original coating.

I'll try to get a better brighter picture next sunny day. The solutions also work on Carbon Steels. I make knives so I look forward to that. Next project with this stuff is my coach gun.

Pictures:
 

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Any pics of how much of a polish you got it down to? Does the color case hardening process offer as much protection on the finish?
 
Don't have pix of the bare metal. Offers the same protection as bluing. On stainless it's more of a look than protection. I'll get more pictures in better light.
 
I too love color case hardening as a finish, although often it is used only on part of the gun—typically the receiver. It's kind of anachronistic on a modern gun.

Nonetheless, I absolutely agree that projects like this that make your pistol YOURS are interesting, fun and usually worthwhile. I'd love to see some well lit detail photos, although CH is very hard to photograph and bring out the subtle coloration.

I'd be interested in doing this on some stainless knives that are just too bright and shiny for my tastes.
 
I like it! You have definitely made your Shield a one of a kind and definitely "yours", and I mean that in a good way.
I've always had a thing for those old case hardened revolvers, but I don't think I've ever seen this on a more modern semi-auto.
I might be tempted to try it, but I would probably do the entire slide. The case hardened effect is too pretty to limit to a small area, IMO, although the contrast of the highlighted areas that you did contrast beautifully with the original finish.
If I were to try this, I would do the entire slide and allow it to contrast to the original all black frame.
 
Bear in mind that colour case hardening is not a finish. It was the outcome of hardening parts when steel technology was still a baby. The luxury SAA from Colt were all blued

One that belonged to infamous Bob Dalton.
 

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Kurusu said:
Bear in mind that colour case hardening is not a finish. It was the outcome of hardening parts when steel technology was still a baby. The luxury SAA from Colt were all blued

Colour case hardening IS a finish, just not an APPLIED (spray-on or plated) finish. It's like bluing in that it changes the metal surface -- but it's just a mostly-decorative "finish" that isn't very functional.

The chemical treatment being used by the original poster is similar to the traditional color case hardening, but perhaps with even less of a protective function -- it's done mostly for looks

The colored surface of a S&W slide is NOT the finish -- it's mostly a cosmetic application. The hardening process is done before THAT colored material is applied. Removing the colored surface isn't likely to affect the factory-applied case hardening (which toughens the metal surface), and the chemical "case-hardening" being used on top of that will just make it look different.
 
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Don't have pix of the bare metal. Offers the same protection as bluing. On stainless it's more of a look than protection. I'll get more pictures in better light.

Actually the cold bluing solution should passivizate the stainless steel to some extent to the end result of this process will be MORE corrosion resistance than either blued or color case hardened Mild Steel.

BTW, Passivization is the use of an acid to leach iron out of the outer surface of a stainless steel so the surface has a higher percentage of Chromium content and it's done to S&W's stainless revolvers to provide some additional corrosion resistance to the 400 series stainless used in these revolvers. Note, 400 series stainless steels are magnetic and can be heat treated just like high carbon mild steels. In fact type 416 can be heat treated in the same manner as 4140 steel and produce nearly identical mechanical properties as 4140 steel. Basically 416 is a corrosion resistant "version" of 4140.
 
As my Uncle Roy said, "It's good we all don't like the same things or everyone would want my woman."

I'm all for doing whatever floats your boat with the guns you own. I have a highly decorated AK 47 that causes people to either laugh or groan when they see it, but I like it.

All that said, there are several firms that offer color cased 1911s and they look wrong to my eyes.
 
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