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-   -   Mosin clean up (http://www.firearmstalk.com/forums/f37/mosin-clean-up-50737/)

Jpyle 10-28-2011 07:24 PM

Mosin clean up
 
It's been awhile since I purchased this 1938 91/30 but I finally got the time to strip it down and clean it up. Out of the box it didn't look to be too mucked up with Cosmoline, good thing since this is my first one.

Here are a few pics of the different steps and products used...all in all a fairly straightforward but time consuming process. Turns out the major ingredient is elbow grease and lots of hot water...and no the rooster isn't needed but comes in handy to add atmosphere to the photos. :)

http://i1092.photobucket.com/albums/...k/SDC10396.jpg

Here are a few pics of the metal parts soaking in boiling hot water, the Cosmoline just melted off and floated to the top of the water. One item to note, do not allow the water to cool down...the Cosmoline will congeal back to a waxy substance that gets back on the metal when you take it out of the water.

http://i1092.photobucket.com/albums/...k/SDC10397.jpg

http://i1092.photobucket.com/albums/...k/SDC10398.jpg

http://i1092.photobucket.com/albums/...k/SDC10399.jpg

Jpyle 10-28-2011 07:32 PM

After getting all the metal parts de-Cosmolined it was time for a bath in a 10:1 mixture of Mobil 1 and Marvel Mystery Oil (thanks Cane).

Here's another warning...before you reassemble the barrel and stock reinstall the rear sight mount, leaf spring and sight base. You may (will) need to use a C-clamp or some other tool to depress the spring enough to insert the roll pin (unless you have the strength of Hercules or a GI Joe Kung Fu grip). Be sure to protect the barrel and sight base with a towel of some sort. Trying to complete the sight with the stock on is, well..let's just say frustrating.

http://i1092.photobucket.com/albums/...k/SDC10402.jpg

http://i1092.photobucket.com/albums/...k/SDC10401.jpg

http://i1092.photobucket.com/albums/...k/SDC10400.jpg

I tried to get a shot of the bore...its actually quite bright with very noticable rifling with no signs of any counterboring.

http://i1092.photobucket.com/albums/...k/SDC10404.jpg

Now on to the stock. It has a nice reddish color that I want to preserve so I think its Murphy's Oil Soap and lots of work, I'll post up pics of the finished product as soon as they're available.

jpattersonnh 10-28-2011 07:43 PM

The Red Color is actually shellac. Good job!

Hinermad 10-28-2011 07:45 PM

I de-cosmofied the parts of my PSL in boiling water and had a similar problem - I couldn't lift them out of the water without pulling them through the oily layer floating on top. I ended up cleaning them a second time with mineral spirits. Maybe if I'd let the water cool down until the cosmo congealed and skimmed it off first they'd have come out cleaner.

Marvel and Mobil 1, that's a good idea. Thanks!

Dave

canebrake 10-28-2011 07:54 PM

Quote:

Originally Posted by Jpyle (Post 613347)
After getting all the metal parts de-Cosmolined it was time for a bath in a 10:1 mixture of Mobil 1 and Marvel Mystery Oil (thanks Cane).

You're welcome.

http://i1196.photobucket.com/albums/...911/tip3-1.jpg

That stuff (Cane's Mobil Mystery Gun Oil) really works!

Great post Jpyle!

JonM 10-28-2011 08:45 PM

Quote:

Originally Posted by Hinermad (Post 613361)
I de-cosmofied the parts of my PSL in boiling water and had a similar problem - I couldn't lift them out of the water without pulling them through the oily layer floating on top. I ended up cleaning them a second time with mineral spirits. Maybe if I'd let the water cool down until the cosmo congealed and skimmed it off first they'd have come out cleaner.

Marvel and Mobil 1, that's a good idea. Thanks!

Dave

sink some paper towels in the water with the parts make sure you weigh em down with something other than parts to be cleaned. when ready to remove carefully cover parts with submerged towels and lift. cosmo will stick to towels not parts.

Jpyle 10-28-2011 08:58 PM

Quote:

Originally Posted by Hinermad (Post 613361)
I de-cosmofied the parts of my PSL in boiling water and had a similar problem - I couldn't lift them out of the water without pulling them through the oily layer floating on top. I ended up cleaning them a second time with mineral spirits. Maybe if I'd let the water cool down until the cosmo congealed and skimmed it off first they'd have come out cleaner.

Marvel and Mobil 1, that's a good idea. Thanks!

Dave

That's what I would up doing as well, brushed everyting down with Mineral Spirits to get rid of that waxy residue on the metal.

Jpyle 10-28-2011 08:59 PM

Quote:

Originally Posted by JonM (Post 613413)
sink some paper towels in the water with the parts make sure you weigh em down with something other than parts to be cleaned. when ready to remove carefully cover parts with submerged towels and lift. cosmo will stick to towels not parts.

great idea...thanks, I'll have to remember that.

Jpyle 10-29-2011 04:38 AM

Finished product...all shined up and ready to rock and roll...

http://i1092.photobucket.com/albums/...k/SDC10405.jpg



http://i1092.photobucket.com/albums/...k/SDC10408.jpg

http://i1092.photobucket.com/albums/...k/SDC10407.jpg

Hinermad 10-29-2011 01:15 PM

Nice work! The orange polish didn't leave the wood sticky, did it?

Dave


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