johnpatt@WARWICK.NET writes:

<< I had an entire Syncro exhaust JET-HOT coated and it is now
     rusting in several places.... >>

FWIW-I had my last Tri-Mill 'Bobcat' style Baja extractor flamed
sprayed with aluminum.  Not the most current and technically
advanced method as I believe that its been around since the '40's,
but was cheap and effective.  Ran me about $45 if memory serves.
After the flamespray I simply used a high temp paint to cover the
open aluminum pores.  That exhaust looked fresh and no rust was
noticed after a couple of years outside in our glorious Pacific NW
weather.

-Todd Hill
 VolksWerks Transaxles
 Olympia, WA
 360-412-0948