It sounds like a jammed nozzle, since you got one coat out of it. My best advice for the future is to invert the can and spray upside down until clear gas comes out after each coat.
When this happens, I try to remove the nozzle. If you use a sewing needle to try to clean/ bore the nozzle, then try it out before hitting the model again. Like the other ideas about warming and increasing pressure. I can't remember the best thinner/cleaner. Maybe it's thinner, acetone, or mineral spirits.
If it seems to have run out of propellant (I think it happened to me once), then talk to your retailer. They are more likely to care about your plight. The gas could have excaped and left the liquid paint.
If you do have to wait for a replacement can, remember to keep the model clean until the respray. It doesn't hurt to wash it gently once more, very little soap, very light scrub, but do make sure it is dry before proceeding. Dab up excess water, and use a hair dryer to dry.