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From: n295vvv

I am a chemist.  I have the following pearls of wisdom:

Dont use petroleum distillates to clean your surfaces!  Petroleum is oil, isnt
it?

Dont use acetone if methylene chloride is available to you.  If you do use it,
dry it off well with a heat gun afterwards. Careful! I once burned down a
building with a pint of acetone.  I am not a fan of acetone for this
application.

Dont use any of the mixtures that are available as strippers.  Some of these
companies buy recyled solvents that probably have oils in them in small
amounts.

The advantage of MeCl2 is that it cuts the oils, flows off nicely, and
evaporates completely in a few minutes.  It really is not very toxic, but
ventilate and wear gloves.

All of the other junk you guys are using can come back and bite you!  I liked
the glass test mentioned.  Smear some grease on a glass plate and clean it
with your substitute.  It must clean off completely, down to the part per
million level.

Methylene chloride is the only solvent which reliably does that.  Dont mess
with this critical use.  Having your skin come unbonded at 300 kts will make
for a bad day.  It has already happened by the way.'

David Jones, Pecatonica Illinois