I'll take some time here to wax philosophical on why it's hard to standardize this custom paint thing.
How do you know what to
charge for a custom paint job?
Some art is more complicated than others. When a a customer asks how much to paint a face, I explain that it can be as simple as a cartoon or detailed but non specific like a dog (one german sheppard looks generally like the rest) or super specific like a person with a unique face that looks like nobody else. Even twins (and I speak from experience) have subtle differences that must be adhered to or the customer will notice and may be less than impressed. Is there a background involved or not? Does the image have to include limbs, lacy frilly outfits and look like a specific person?
Do you only
do the whole paint or only the art and graphics?