EH> It's not unusual for the stainless exhaust systems in
EH> airplanes to be
EH> perfectly fine after 30-40 even 50 years.  The Hanlon Wilson
EH> muffs on my
EH> bugsmasher are barely discolored!  (It's a '46)
 Any idea on aluminized ?? Mine looks NEW after almost five years.  
 
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