Strawing Small Gun Parts
here is a temporary fix... I still haven't had time to do this "right"... so here is the info in this post...
I will create a proper post for a Sticky note and put it at the top of this forum when I can find time... Sorry for the delay.
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A process for creating â??strawâ? color finish on steel gun parts
â??Strawingâ? or coloring small steel gun parts with heat is a fast and simple process. Do not try to make it complicated. If the process does not go smoothly just stop, and take a break , and then start over again. You can not mess up the outcome, but you may have to start over, especially if you have achieved a color darker than you wish. You will just have to re-polish and then re-heat treat the parts again until you get the color you are trying to achieve.
Buffing can take a toll on proof marks and serial numbers so you want to be cautious. I learned this process. This process originated from Harry Jones, author of the book â??Luger Variations,â? as used by him in his California shop some 35 years ago. This process has been used successfully to straw color the small parts on at least 400 plus Luger pistols all over the world since then.
On the checkered areas, such as the magazine release and take down lever, it may be sufficient to properly prepare these surfaces by just using a heavy wire brush. A fine wire wheel on a buffing machine is a good method to do this. Another method would be to use a small wire wheel on a Dremel tool to achieve the same degree of cleaning. The small parts should then be polished with 240 grit polish on a buffing wheel. You do not want to bring the surface to a bright mirror finish, as that would exceed the finish applied by factory work, and you should try to come close too what was done at the time of original manufacture. Tight and hard to get into places can be polished with approx 360 grit sandpaper.
The surfaces that do not show when the gun is assembled do not need to be polished, even if the part is already blue or patina. It makes for a more professional job if you do, but in areas behind the trigger, this may prove tough to get to. Also, if your ejector is pitted, you should polish it on the area that shows when the gun is assembled. You can also polish the underside of the ejector, but if removing pits on the under side of the ejector is going to make it too thin, then stop polishing after outside surface is done. Un-seen and un-polished parts will not affect the out come of the new straw finish on the polished areas.
Once polished, use something like â??gunscrubberâ? to degrease the entire part! Also degrease the tools you are going too use for handling the parts during the strawing process. Heavy tweezers should be used to handle the parts once they are cleaned, and again as they come out of the oven. Degrease at least the part of the tool that will come into contact with the part. Even clean washed hands will leave some oils on the parts and this may cause the finish to be other than your objective so be careful. Oil of any type will mess up the finish during the strawing process.
Heat your oven to approx 450* (degrees Fahrenheit). The hotter the oven the darker the color result will be. But a hotter oven will also color faster, so watch carefully for the color you want and immediately remove the parts from the oven once you achieve that color.
Use 530* for a darker Krieghoff-type look. Use 510* for 1940-43 ejector temper blue. If you just stick with 450* you will very likely be fine.
Place parts in a small de-greased pie tin in the center of oven and stand back and watch the parts through the oven window. Right before your eyes the part or parts will start turning that magical straw color. Smaller thinner parts will color faster. Take the parts out of the oven individually once they achieve the color shade you want.
If the color is darker than you desired, you have waited too long so you have to cool the parts and re-polish. Then degrease and start over. Heavy thicker parts will take longer.
It is recommended that once you get the color you are looking for, immediately take the parts out of the oven and start cooling the parts with a light oil. 3-in-1 brand oil is recommended, but any sewing machine or light gun oil will work. Use several light drops, donâ??t be cheap on the oil, but there is no need too have the part swimming in it. When the parts have cooled down too room temperature, wipe the excess oil with a soft cloth and install the parts. You will be very pleased with the results.
â??Strawingâ? small parts is just that easy!
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regards, -John S
"...We hold these truths to be self-evident that ALL men are created EQUAL and are endowed by their Creator with certain UNALIENABLE rights, and among these are life, LIBERTY, and the pursuit of happiness..."
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