+ Reply to Thread
Results 1 to 8 of 8


  1. #1
    Sidewinder
    Join Date
    Nov 2009
    Posts
    143
    Member #
    12675
    Thanked
    8 times

    Touch-Up Cold Bluing

    Recently I did a little touch-up work on a 39A using 44-40 Bluing. It applied fairly well, looked OK right after, but one week later it has turned brownish; seems like I did read somewhere that cold bluing does not protect from rust. Now I guess I will trry to re-blue the same area; can anyone recommend a way to keep from the touch-up looking fresh? How about a thin layer of Rem-Oil as soon as possible after the bluing sets? Would appreciate any tips -
    "We Dare Defend Our Rights"
    Alabama State Motto

  2. #2
    Site Contributor Super Moderator
    Join Date
    Dec 2008
    Location
    E. Washington
    Posts
    11,352
    Member #
    7674
    Thanked
    5398 times

    Re: Touch-Up Cold Bluing

    Quote Originally Posted by marlinmounter
    Recently I did a little touch-up work on a 39A using 44-40 Bluing. It applied fairly well, looked OK right after, but one week later it has turned brownish; seems like I did read somewhere that cold bluing does not protect from rust. Now I guess I will trry to re-blue the same area; can anyone recommend a way to keep from the touch-up looking fresh? How about a thin layer of Rem-Oil as soon as possible after the bluing sets? Would appreciate any tips -
    I've used 44-40. I tend to get blotchy results but I think that is more reflective of my novice attempts than the product.

    But, it has held up well. I've read a lot about cold bluing not being as effective as hot bluing but I often wonder...I mean, when a smith does a barrel re-crown or other small work, they use cold bluing and no one thinks twice about it.

    Maybe yours is a surface prep issue? Just tossing something out there is all.

  3. #3
    Marlin Marksman
    Join Date
    Jun 2008
    Location
    Lake Grove, L.I. New York
    Posts
    1,686
    Member #
    5832
    Thanked
    175 times

    Re: Touch-Up Cold Bluing

    Make sure the area that is to be blued is degreased, heat under a heatlamp or toaster oven if a smallish part, do multiple coats and when done, oil the area.

    Hip

  4. #4
    Site Contributor Contributing Member
    Join Date
    Mar 2004
    Location
    SE PA
    Posts
    2,190
    Member #
    150
    Thanked
    402 times

    Re: Touch-Up Cold Bluing

    I use Birchwood Casey Perma Blue and my process is as follows:

    I degrease with denatured alcohol, heat the part in boiling water and remove quickly to the work area (any water on the part will flash off). I apply the solution with a cotton ball well soaked. Keep the solution on and moving for 60 seconds then rinse. Buff lightly with degreased 4 aught steel wool and repeat the process 3 or more times. The last application, I do not buff, but instead drop the part into a container of motor oil and let it pickle for at least 24 hours. Then I remove, give it the final buff (with the oil still on the part) wipe it off and decide if I'm happy. Usually I am, but if I'm not, I start again.

    For most steels this gives me a decent depth of finish and reasonable durability.

  5. #5
    Sidewinder
    Join Date
    Nov 2009
    Posts
    143
    Member #
    12675
    Thanked
    8 times

    Re: Touch-Up Cold Bluing

    Guys,

    I appreciate all the pointers...I did not heat the area, nor did I do enough coats. Will start over and do 'er again with your sugestions...
    "We Dare Defend Our Rights"
    Alabama State Motto

  6. #6
    Site Contributor Contributing Member
    Join Date
    Mar 2004
    Location
    SE PA
    Posts
    2,190
    Member #
    150
    Thanked
    402 times

    Re: Touch-Up Cold Bluing

    The oil pickling after final application is very important. Don't be shy. If the part is too large to drop in a bath, really slather it on. Dripping excess is what you're looking for and at least 24 hours before you disturb it.

  7. #7
    Team 45/70 Co-Capt'n Contributing Member
    Join Date
    Jan 2009
    Location
    NEPA
    Posts
    7,252
    Member #
    8273
    Thanked
    1903 times

    Re: Touch-Up Cold Bluing

    Some good gun oil when done will stop the bluing process. With out it I think is why it's turning brown. Yes do degease I use brake cleen and heat with a hair dryer then blue.
    Lou

    Quote...
    "Marlin is gone forever. All that remains is the Trademark Marlin name that someone put's on their inferior products!" LEVER ADDICT

    Team 45-70 #3 Team 44-40 #5
    Team 35 #327 Team 30-30 #340
    Team 38-55 #2 Team 1894 #273

  8. #8
    Sidewinder
    Join Date
    Nov 2009
    Posts
    143
    Member #
    12675
    Thanked
    8 times

    Re: Touch-Up Cold Bluing

    Guys,

    After my first poor attempt at cold bluing, I took all your advice in, used Imashooter's method (the touch-up was the rear sight dovetail - I installed a Skinner peep, removed factory notch rear sight, and unfortunately buggered the blank trying to fill in the empty dovetail slot). So, I used a small fine file, smoothed the blank down almost flush with the barrel, but unavoidably left a few scratches on the barrel. I taped off the area to be reblued, degreased as per Imashooter's instructions, heated barrel with hot hairdryer per Leveraddict, and used a cotton ball to put the bluing on the dovetail blank and adjacent barrel scratches. Then repeated 2 times, lightly buffing with 0000 steel wool between applications, and soaked a cloth in RemOil and BreakFree, laid on top of the barrel, and the next day, I can hardly tell where the professional bluing ends and my amateur bluing blends in...might degrease and try 1 or 2 more coats to make perfect, but it really looks great now, and no brown has appeared I would assume due to the heavy oil treatment.

    Gunsmith I am apparently not, but you guys saved the day...Thanks! You are why I love MO!
    "We Dare Defend Our Rights"
    Alabama State Motto


Home | Forum | Active Topics | What's New | Subscribed Threads

Links

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts

Search tags for this page

44-40 bluing

,

44/40 bluing

,
cold bluing
,
cold bluing 44/40
,
cold bluing touch up
,
cold bluing touch ups
,
how to remove remoil
,
how to touch up gun blueing
,
tips on touching up bluing
,

topuch up cold bluing for metal

,
touch up bluing
,
touch up cold bluing
,
www.marlinowners.com 62668-touch-up-cold-bluing
Click on a term to search for related topics.