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Hi-Performance coatings of Salt Lake, Jeff Holmes manager, has coated my
exhaust and several other aircraft.  They mainly do race engine parts. Jeff gave a show and tell talk to our EAA chapter.

On the Lancair IV, do not coat parts prior to the turbines, as it will
increase the exhaust temperature in the turbines to too high a level.  I
coated the cross over exhaust pipe and the pipes from the turbines.  The
coating is on the inside as well as the outside of the pipes.   It ran
$10 to $15 per foot 7 years ago.  Obviously, do not coat parts inside a
heater. On an acroduster, the pilot reports that after flying, by the time he
gets the cowling off, he can touch the exhaust pipes without getting
burned.  The aluminum-ceramic coating insulates the pipes and the heat goes out
with the exhaust.  Pipes last up to 5000 hours.  I will get a telephone
number for Jeff today from my hangar, if you are interested.

Bob

LML website:   http://www.olsusa.com/Users/Mkaye/maillist.html
Builders' Bookstore:   http://www.buildersbooks.com/lancair

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