Though there's always an exception, what you are encountering is very typical. Once the painter has spent your money, new money that suddenly comes through the door becomes very attractive whether it is to pay for overdue rent,payroll,etc.
'Tain't so around here (about being typical). If you paid any money up front you made a fundamental mistake. If their money is hanging on getting the job done it gets done in a timely fashion. I agree with the idea of asking folks with finished cars who they used and if they are happy with the work. A fresh paint job can look good only to show poor prep when the paint cures and shrinks.
