The airbrush set comes with an "introductory size" can that I think lasted me for about three cars worth of spraying. Then I got a big can, about twice the size, for $7, and it's been going strong for a couple of kits now. I've heard of folks doing ten kits or so with one.
Keep in mind I also use spray cans, too. I usually buy one can in the body color per model and use that. Sometimes I use up the whole thing, sometimes not. I use the airbrush for everything else. Suspension, undercarriage, interior, some detailing, anything that gets masked off...
The reason I asked about if you were building it as a "heavily modified" street car is because that's the only Primera kit. Same deal with Honda Accords. So, if anyone ever wanted a road-version of either one, they'd have to un-race-modify the kits. Take a look at yours and imagine how much work all that un-doing would take!
So, most people take the easy way out and say it's a road car that's "heavily modified."
