Sure and depending on the complexity and pre shape of the plane slip $500 in a envelope along with it.
When I was painting 64" span pattern ships for customers, back in the late 80's and early 90's, I was getting 500.00 back then.
But that was with auto paint and auto clears and no open bays, all sheeted wings.
Depending on how the model was prepared, most of them being poorly prepared, I would sometimes charge even more money.
Most of these guys were competitors, who didn't have the ability to do a first clast paint job themselves, so they didn't mind the cost at all. Most had really good incomes.
The interesting thing is, they all took credit themselves for my work. Expected.
This photo was my own pattern ship which I scratch built and painted in the 80's.
This is a good example of the kind of painting I did for that 500.00. Not complicated, but colorful and thought out.
This model is only 55" in span.
Robert, for a modeler with your professional painting abilities and talent, I believe you can charge more.
Added better photos.