Here I go again.... I just received the cake air brush that I purchased on ebay. As hard as it was for me to believe, this BRAND NEW air brush did NOT come with a manual. I struggled to get it assembled, and think I finally have it assembled. But I've obviously done something wrong, as the compressor won't continue pumping air steadily. It's on for about 2 seconds, cuts out, then resumes. The regulator has a round pressure gauge, and the pressure never goes higher than zero. Before I throw this piece of crap out the window, WHAT AM I DOING WRONG? This wasn't particularly cheap = $150 with tax, so I don't think that's it. But I have NO idea what I'm doing.
They did give me great customer service. I waited about 8-10 minutes on hold, but when I got the person on the phone, he was extremely helpful. He even was pro-active and had me take it apart so he could show me how to clean it, which I'd need in the future. I think I understand it now, and now need tons of practice. I really think I only want it to paint flowers and leaves, but who knows?
I bought this model:
Master Performance Multi-Purpose Series
Airbrush Model G22 Multi-Purpose Precision Dual-Action Gravity Feed Airbrush from the Kustom Paint Superstore. It came with 12 full size bottles (8 oz each) of Americolor food coloring, and has a 1/5 hp motor. Their customer service was really excellant!
But no, I was told it doesn't come with a manual... 
I use mine to color gumpaste all the time. If you spray the color on first, let them dry, then later dust them with petal dust you'll get a nice depth of color.
Usually if you google the manufacturer and the item, you should be able to find a manual pdf that you could print and have on hand. Try it, it couldn't hurt anything.
Tesso, Be kind and remember I'm a newbie: what all do you use this thing for? I know you can do background colors on the cake, plus the embellishments. Does this make the gumpaste flowers look better than the petal dust I currently use?
I use it for everything, flowers, gumpaste, RI, buttercream. It all gets covered. It is especially helpful with red and black, navy, purple. All those hard to achieve, fading colors. Just airbrush and be done with them !! 
It does take practice, and be prepared to throw fondant, flowers and anything else once in a while, because it is frustrating at first. but it will come to you and you will be in "airbrush heaven too!!"
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