the plastic will buff out if there is any paint left. You'll need to use several waxes & polishes.
If you have to paint, the air brush sounds like a good idea. Buying a pint of paint will cost lots. For example to paint one plastic panel, the paint will cost nearly as much as buying the panel from the dealer. Of ourse you'll have enough paint left for other work.
Decals are always a good fallback.
Also, I've had really good luck with a flat black Sharpie pen. Depends on the color, but it does a great job with the Bandit candy apple red. You might have luck with other pen color combinations depending on your color. For some reason the flat black disapears with the red.
John 1998 B12
50k miles