Throttle body & airhorn after
Alternator before
Alternator after (I painted the aluminum case halves with paint that imitates new cast aluminum look, cleaned interior of alternator also)
The plenum, IH's & airhorn/throttle body cleaned up pretty good. There are some stains I can't get out and the top of the throttle body has an area where the coating is missing, but they look much better than before.
That's it for now.