[R-390] More chemicals from the dark side

[Shoppa, Tim]

My limited experience with automotive chemicals applied to non-automotive mechanisms:

* Kerosene is far and away the best parts wash solvent given some working time (e.g. overnight).

* Brake cleaner is a very fast-acting degreaser/solvent. It dries skin out real fast too. Smells like cleaning fluid? It also can take off many paints and probably not good to get it on synthetic rubber. I have used it near plastics without any obvious problem.

* Carb cleaner seems to have acetone and toluene in it. It doesn't dry skin out real fast like brake cleaner, but I've also seen it damage plastics.

My conclusion with respect to 390/390A geartrains, with my experience rebuilding yellow stripers, is that kerosene soaking is far and away the way to go but does require tearing down/rebuilding.

-----Original Message-----
From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net] On Behalf Of Ron Hunsicker
Sent: Friday, February 04, 2011 10:39 AM
To: R-390 List Serve
Subject: [R-390] More chemicals from the dark side

All,

Since the introduction of the mostly-polymer Glock pistols in the 
mid-1980's many other firearms manufacturers have introduced firearms 
with the grip and lower frame manufactured from polymer chemicals and 
the barrel and its frame from steel and aluminum.  Apparently, some of 
these polymers react badly to some traditional firearm-cleaning 
chemicals.  Shooter's Choice "Polymer Safe Quick-Scrub Action Cleaner" 
is said to be "safe for polymers, plastics and metals" and is also said 
"...not to harm delicate optics, sights, paint, or camouflage 
finishes."  As with most gun cleaners, it is "extremely flammable."

Remember, there are many types of plastics and paints, many that are not 
used to manufacture or coat firearms.  Try it in an out-of-the-way place 
before general application.

Also, firearm cleaning chemicals are used to remove products of 
combustion, lead, and brass.  Many do this by reacting chemically with 
the lead or brass.  Be careful what you dunk stuff into.

It is my understanding that Hoppe's #9 is a primarily cleaner and not a 
lubricant or preservative.  Once you are done cleaning with #9, 
Shooter's Choice Quick-Scrub, or Gun-Scrubber,  wipe the gun or radio 
part with a soft rag, and then apply a suitable lubricant or preservative.



Ron


-- 

Ron Hunsicker

1238 Cleveland Avenue

Wyomissing, PA   19610-2102

610-478-0371

ronhunsiat ptd dot net

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