Very light spray pattern

If the needle is stuck in the needle bearing, the needle chuck will slip.  If the brush has been in storage for a long time, this could very well be the case. If it is stuck partially open, it will spray at that volume, but won't change.  You might want to try removing the needle to make sure it is free.

You must have the old style 200.  It may have a 0.25mm or 0.5mm nozzle.  The 0.5mm should be big enough for most modeling purposes.  But, I don't know how large an area of coverage you are looking for.

You might want to invest in a new tip, spray regulator, and needle.  They don't cost much, spares are nice to have, and it would eliminate one possible source of your problem.

If that doesn't give the coverage you want, you may need something with a larger nozzle.

If the compressor is as old as the airbrush, it might need some work, or replacement.

Don

John..The MM paint I used was Enamel.

Don....I'm pretty sure the needle is moving........if it wasn't, I wouldn't of gotten any paint out.

I first said the compressor was a Badger 180-1.......it's actually a 180-11 (does it make any difference?). My airbrush is just a Badger 200. The instruction book I found is dated "1978"........could I really had it that long!! The air hose had a hole in it, but I got it taped up pretty good.(I will get a new hose)

That compressor should do fine with your 200.  Is it new?  Do you get a good blast of air out the front of the airbrush?

Which 200 do you have?  If it's a 200NH, you should get plenty of spray.  If its a 200 detail airbrush, it will have a smaller nozzle and you won't get so much.  

Are you sure the needle is really moving?  Sometimes the needle chuck slips.

Don

You'd better drop psi to 15 or lower.

Personally I use a thinner mix on MM enamels. I use at least 50% thinner, sometimes a bit more, especially as the paint in a jar thickens with age (thinner vaporizes off each time we open the bottle).

Needle adjustments will alter output to a degree, and some volume. If you're happy with the "spread" you have, try adjusting the pressure on the compressor itself rather than the needle.