Paint shop jail... No parole!!!

If you have paid everything in full already...he's probably lost interest in finishing it....

I'd say like some the other members...cut the loss and take the car away...FAST

No, the timeline is normal. He had major sheet-metal replacement, custom panel fitment to 1/8" (this alone is labor intensive and time consuming), and rust repair.

I see that he has paid for materials, I wonder if he has paid for labor.