WM> Also, I do not have any information regarding air compressors. My
WM> constraints on an air compressor is that it be fairly compact and
WM> portable and that it not be very noisy (It will only be used for models).
WM> I am looking for a good (quality) compressor at a reasonable price.
WM> Any suggestions?
..as far as aircompressors, getting one with an airtank attached is preferable otherwise you'll be running it continually. I recommend whatever one you get has a bleed-off relief valve.
Regardless of what you buy get an oil/moisture filter/trap and a regulator.
Air pressure will vary from airbrush to airbrush; medium used; viscosity; and, temperature and humidty factors present when spraying.