I cleaned the rotors that I intend to use, soaking them in carb cleaner
for
  a week.  They clean up real nice.  I noticed a patchy light almost looks
  like an adhesive deposit on the side surface located between the side
seals
  and the edges of the rotor.  Does anyone know what this is? Thanks

  Joe Berki

  It is probably a Teflon coating that reduces the crevasses around the edge
of the rotors
  to reduce unburned HC storage for emissions reasons.

  Paul Lamar



Paul,

I can feel the pitting with my fingernail.  It could be corrosives in the
fuel or oil.  It is on the combusion side.  I will try to get pics.  Also
found a small ding in the rotor face that is far away from the apex slot and
bathtub.

Joe Berki

Yep that looks like the Teflon stuff. Not to worry you don't need it.

Paul Lamar


   Something I do to my engines is to taper clearance the sides and
this would eliminate the pits, I cut about 10 thousandths off at the
tip and down to zero where the bluing is.
  This is to reduce scuffing of the side housings at high rpm.
  Ken