SLC and frost, who would have thunk it?
Frost can be polished smooth, but a gallon or two of alcohol 
spray does a good job on light aircraft as long as there is 
no precip falling and the sun is out.  Airports stock 
alcohol for windshield and  prop deicing on aircraft.  Don't 
use the stuff they sell at the auto stores for car 
windshields, it will probably damage the plastic windows on 
your plane.
The best cure,aside from a trip to Florida, is a heated 
hanger.  Roll the plane in under the IR heaters, and 
pre-flight while the frost disappears.  Cold weather 
pre-flights are often rushed and incomplete because of the 
cold.
If you have to do it outside in -20 wind-chill, dress 
properly, hypothermia can make the take-off dangerous since 
your mind won't be work at 100%.
"gpsman"  wrote in message 
  oups.com...
Jim Macklin wrote: brevity snip
 Before take-off, airlines spray boiling hot water on the
 airplane (180° or so) to remove the snow and ice, then 
 they
 switch to a heated mixture of water and anti-freeze to 
 keep
 any ice from accumulating on the airplane during the time 
 it
 takes to taxi and take-off.  As rain/snow fall on the 
 plane
 and melt, the antifreeze solution become diluted and the
 water will begin to freeze in hinges and such.
Light frost on the aircraft prompted our pilot in SLC to 
de-ice.
One plane ahead of us: total delay ~45 minutes.
http://i16.tinypic.com/4gr9p8n.jpg
http://i10.tinypic.com/2rcu9sh.jpg
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- gpsman