It just needs to spray on a hot surface to ignite.  Everything has a combustion temperature, some things are lower and some things are higher.  Finely atomized metal will ignite explosively when the conditions are right, right?
  As a side note, glycol has been banned in antifreeze building fire sprinkler systems, because of a recent fire where the system went off during a kitchen hood fire and the antifreeze burned so intensely that it killed several firemen.

Mike B.

Sent from my iPhone

> On Mar 26, 2014, at 11:21, "Chris S." <szpejankowski@GMAIL.COM> wrote:
> 
> ... Surely someone has a torch, a crucible, and some 50/50 coolant mix to test this.
> 
> Scientifically curious are standing by...
> 
> Chris.
> 
> Wysłane z iPhone'a
> 
> Dnia Mar 26, 2014 o godz. 8:40 Pete O <pnoceanwesty@GMAIL.COM> napisał(a):
> 
>> Just read this on an RV site:
>> 
>> *A pinhole-size leak in a radiator or heater hose can spray antifreeze on
>> hot engine parts. Antifreeze contains ethylene glycol concentrate and
>> water. When the water boils off, the remaining ethylene glycol can
>> self-ignite at 782 degrees F. During your monthly fire inspection, check
>> all hoses for firmness, clamp tightness, and signs of leaking.*
>> 
>> 
>> Pete
>> '87 Westy "JoesVan"
>> '79 Westy "Aardvark"