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Removing cosmoline

whitesoxnation

Well-Known Member
pilot
Contributor
Could someone tell me if I did this right? I don't want to have it blow up on me at the range tomorrow.

The Mosin I bought was all gunked up with the stuff. What I read is that you could use solvents, diesel, boiling water, or some other stuff to remove it. I chose boiling water because it was the easiest.

I broke the rifle down as far as possible besides messing with the extractor. I put the wood parts in a trough and filled it with boiling water. I left it there for about 5 minutes then took it out. It was covered in a grey/greenish layer. You could see the oils in the water and it had turned brown. I used a soft steel brush to get the film off, then it would re-appear. I repeated this process (boiling/scrubbing) until the layer would not come back. I didn't know if it was the cosmoline or if it was the finish, but when I had the layer removed the wood was noticeably lighter.

I did the same with all the metal parts, dried them off, lubed up the individual bolt parts, then put everything back together and did a function check.

Did I do this right? I was concerned that I could have weakened or warped the wood some how (it kind of makes a creeking noise that I didn't notice before when I hit the hand guards).
 

wlawr005

Well-Known Member
pilot
Contributor
Could someone tell me if I did this right? I don't want to have it blow up on me at the range tomorrow.

The Mosin I bought was all gunked up with the stuff. What I read is that you could use solvents, diesel, boiling water, or some other stuff to remove it. I chose boiling water because it was the easiest.

I broke the rifle down as far as possible besides messing with the extractor. I put the wood parts in a trough and filled it with boiling water. I left it there for about 5 minutes then took it out. It was covered in a grey/greenish layer. You could see the oils in the water and it had turned brown. I used a soft steel brush to get the film off, then it would re-appear. I repeated this process (boiling/scrubbing) until the layer would not come back. I didn't know if it was the cosmoline or if it was the finish, but when I had the layer removed the wood was noticeably lighter.

I did the same with all the metal parts, dried them off, lubed up the individual bolt parts, then put everything back together and did a function check.

Did I do this right? I was concerned that I could have weakened or warped the wood some how (it kind of makes a creeking noise that I didn't notice before when I hit the hand guards).

No...you did fine. After you boiled the shit out of it and then scrubbed it to death it probably still works just fine.

It's a machine, well oiled and well lubed is always a plus...
 

whitesoxnation

Well-Known Member
pilot
Contributor
No...you did fine. After you boiled the shit out of it and then scrubbed it to death it probably still works just fine.

It's a machine, well oiled and well lubed is always a plus...

Thanks. Next step is to shoot the hell out of it and apply a new finish.
 

RedFive

Well-Known Member
pilot
None
Contributor
You can also use gas or carb cleaner (like Killer McCoy!). It's a lot quicker.
 

NozeMan

Are you threatening me?
pilot
Super Moderator
I'm sure you'll be fine. I was worried about my Mosin blowing up in my face the first time I shot it....but it worked out fine!




Peavy...we're waiting...
 

whitesoxnation

Well-Known Member
pilot
Contributor
I'm sure you'll be fine. I was worried about my Mosin blowing up in my face the first time I shot it....but it worked out fine!




Peavy...we're waiting...

I'll never write a team off with around 2 months left, but if you aren't at the top in the weak AL Central it's hard to keep believing.
 
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