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Ditto Mike's experience with the 2000 degree gray
Jet Hot coating. While mine held up well over three years and about 275
hours of flight time and allowed you to put your hands on the pipes within
minutes of shut down, it discolored badly into areas of light green mixed with
the gray. It looks hideous to me.
I recently had a new exhaust made for my plane and
have tried a different coating in a shiny silver finish from a different
place that was advertised to work up to 1600 degrees. After only six hours, the
shine is gone and the coating starting to peel off in one spot.
The place that did it for me swears they've never seen that before and they want
to re-do it, using a higher temp coating on the inside of the pipes. We'll
see how it goes.
Skip Slater
N540ES
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