Sorry, but don't waste money on a cheap airbrush (and cheap equipment).
It just makes it harder to learn properly, and you give up much quicker.
If you are serious about learning to airbrush it will benefit you to invest in
better tools and equipment.
Kevin (KCStephens) said it all!
I have yet to airbrush (or paint) any paper model.
But I can see the benefits of using paint on some Ship models.
where in Canada are you?
I teach airbrushing.
Dave's Designs Airbrush