RC car painting is typically done using one of two methods: spray cans or an airbrush. Needless to say your skill level will be the ultimate determining factor since most people just arent that familiar with the intricacies of airbrushing. Both methods have their particular idiosyncratic advantages and disadvantages, however.
RC car painting via spray cans is the choice of many not only because they either dont have access to an airbrush or know how to use one, but also because it can be done quickly. A huge amount of space can be covered relatively quickly with a spray can. But RC car painting isnt the same thing as changing the color of a flag pole.
You want to be proud of that car and make it look as good as it runs. Although personalizing and detailing can usually done much better by airbrush, if you take your time and plan ahead, your spray can RC car painting can wind up looking quite impressive.
Of course, RC car painting with an airbrush is ultimately what you should aim for. The benefits of using an airbrush is that you have access to so many more colors than you can get from using spray cans. And thats saying a lot, because even if you do choose...