OK- Lets see if i can remember all those questions without looking.
I use an Iwata Eclipse and like it so much I got a 2nd.
I use Createx paints.
Compressor is a 10 gal unit I already had with a water trap & regulator. I spray around 25-30 psi.
Helpful note: If you hold your finger over the cap & spray just air the paint will flush out of the gun back into the bottle in theory. In actuality, you will have a very interesting color sampler on your ceiling!
I use airbrush cleaner after a painting session and just water in between colors. (neither of which will remove paint from the ceiling!)
I find that keeping the bottles in warm water as I'm painting eliminates the need for thinning most of the time.
I absolutley cant stand painting just one plug at a time due to changing colors so I made a stick that holds 12 plugs and each one can be individualy rotated. They all get white first to even out the primer color and then I make them whatever color I want.