First ever de-cosmo job

[Gator417]

So, just bought #5 a few days ago. It's a very nice, dare I say minty, "unissued" Yugo built in 1980 and came with a bunch of accessories. My favorite part is the cosmoline though! It's kind of the gift that keeps on giving.
I watched a few videos for some good advice and ignored it all. I've been cleaning up the metal parts with WD-40 and have had superb results with very little effort thus far. I bought some Murphy's for the stock and handguard, so I didn't ignore ALL the advice, and I thought maybe I could use foaming engine degreaser for the barrel and receiver but I want to make sure it won't damage that fine comblok blueing. I've used this stuff on aluminum and brass with no ill effects but I'm concerned about the finish. Has anybody tried this? I don't mind the WD-40 but I can probably make big progress with the degreaser.
Thanks in advance,
Gator

[LESchwartz]

Don't forget the firing pin channel . . .

Larry

[Gator417]

Yeah, at this point I'm super paranoid about that!

The foaming engine cleaner was a bust. It seems to disipate before it really breaks down the cosmo. The WD-40 continues to impress though. Sprays on easy, does a bang up job at melting the cosmo wipes off easy and also prevents rust while you're going through the process. 5 out of 5, would recomend. It may be a while before I get to the stock but I have seen enough people using Murphy's in their videos that I'm convinced it will do just fine.
Gator

[LESchwartz]

I typically used mineral spirits.  I'm not sure how it compares to WD-40, but I bet mineral spirits is far less expensive.  It does a fair job, especially if you use compressed air.  They do sell WD-40 in gallon cans, so maybe that would be less expensive than using spray cans.

Larry

[easy]

I resulted to boiling the bolt for a few minutes.  Then light oil to prevent rudt.

[LESchwartz]

I resulted to boiling the bolt for a few minutes.  Then light oil to prevent rudt.

Disassemble the bolt, as just boiling often isn't good enough.

Larry