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  • 2 Post By Ryan_Songhurst

Thread: Cold Blue Products - Whats best?

  1. #1
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    Cold Blue Products - Whats best?

    What cold blue products can we get in NZ? I know we can get the Birchwood Casey stuff, but the Americans seem to prefer Brownells Oxpho Blue. I look at the Brownells website, buts has to be shipped surface...can we get this in NZ? Are there any other products? What do people recommend?

    At this stage I just want to do some touch ups.

  2. #2
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    I haven't really found one that's better than any other, but what I have found is multiple coatings cleaned back really well and reapplied gives the best finish. And then, if the final shade still won't match try another brand on top. The second product really seems to darken things up nicely when it's needed...

    This is one reason why the gunsmiths tend not to do very good cold blue touchups as it takes many applications to build up the blue stain in the pores of the steel which takes a large amount of time. If you use the 0000 steel wool and oil burnishing method, if the blue comes mostly off it hasn't taken and you need to keep building up the finish. I've only ever found one or two things that would take in only one application, and they were mostly small soft screws etc not major parts. It's possible to get a really nice deep consistent finish but with the cold or chemical blue products but it takes a fair amount of labour. Can't say how much you need to clean the parts as well - degrease and wipe a few times to get rid of any grease and wear disposable gloves. It's a pain in the arse trying to match a fingerprint left in-the-white to the rest of your nice even cold blue job...

    On that theory, get the Birchwood Casey and have at - you might have the job done and been out for a few shoots by the time the boat arrives!

  3. #3
    Member zimmer's Avatar
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    Birchwood Casey put out quite a good guide in the from of a pdf file. Look for the section on metal refinishing.

    The name of the game is preperation and cleanliness, cleanliness, cleanliness.
    At best though I would rate the method (cold bluing) as only good for touch ups.

    I have their liquid blue, the paste version and their touch up pen.
    Each has its own use/results.

    The liquid seems to give a darker almost black finish. The paste/goo is nicer to use.

    Having read their guide, the biggest mistake I have been making is to leave the shit on longer than a minute b4 neutralising.

    https://www.birchwoodcasey.com/Manag...uide-2013.aspx

  4. #4
    Member Ryan_Songhurst's Avatar
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    Stripped my little brno back to bare metal and blued it with Birchwood Casey super blue. Turned out just like a bought one...
    Name:  20170604_131604.jpg
Views: 195
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    gadgetman and zimmer like this.

  5. #5
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    Like much of the cold blues it will wear off quite quickly

 

 

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