The baffles in the camera turret and the focus mechanism need to be black, but because of their proximity to the detector, paint presents higher risk than elsewhere in the instrument. Black Delrin is a reasonable compromise in this regard, since it is almost as black in the near-infrared as Z306. The concern in this area is not so much out-gassing as fragility, where mishandling might lead to paint flecks on the array. All other baffles. These will be treated with Aeroglaze Z306.
Screws represent a special case.
In these cases, no special treatment is needed. If space constraints require exposed screw heads in critical areas, then the best solution is probably to paint the baffle after it is attached to the next level of assembly, thus painting the screws as well. Note that this implies re-painting the baffle if it is ever removed. Note that screws are stainless steel in order to minimize corrosion. There are several relevant documents.