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From: RWolf99@aol.com
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Date: Thu, 13 Sep 2001 12:07:43 EDT
Subject: Re:  Methylene Chloride
To: lancair.list@olsusa.com
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          <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>
          <<  Lancair Builders' Mail List  >>
          <<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>> 
>>

In a message dated 9/12/01 9:45:45 PM, you wrote:

<<Is there a reason to start using MC; given its serious environmental and 
health effects?>>

Methylene Chloride is a superior solvent to acetone.  I ran qualitative tests 
when I worked in a chem lab in which I smeared a little grease on several 
small copper plates.  I then squirted each one with isopropyl alcohol, 
acetone, and MC (no rubbing).  The isopropanol didn't do a whole lot, the 
acetone loosened the grease, and with MC, the grease just completely sluiced 
off.  It's good stuff.

It's also nasty stuff.  Read the MSDS if you don't believe me.  One drop on 
the floor will evaporate and fill your garage with the threshhold limit value 
for an 8-hour exposure.  You really need good ventilation.  I open my garage 
door after I use it.  I throw the wet rags outside.  I wear the proper 
chemical resistant gloves (I think) and I try not to breathe while I use it.  
Certainly I don't inhale the fumes.

Run your own test.  See how much easier it is to get grease and oil off with 
MC.  Of course, acetone works, too, but you have to work a little harder.

Perhaps a comment from the factory would be in order, or perhaps someone with 
a newer manual (mine's dated 1993) can tell us what's in there on this 
subject.  I have heard that they've run tests which suggest some waiting 
period should be used between solvent wiping and applying BID.

- Rob Wolf
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
LML website:   http://www.olsusa.com/mkaye/maillist.html
LML Builders' Bookstore:   http://www.buildersbooks.com/lancair

Please send your photos and drawings to marvkaye@olsusa.com.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>