67 barracuda argent

Rattle cans are handy. There isn't a whole lot of pigment in that paint though. It's mostly vehicle/propellant. Spray cans have gotten a bit better over the past few years . I'll feel the difference when I lift the can from the shelf. It's still not the same thickness of layer applied in my opinion.
One must also consider what is being painted. Interior and exterior finishes have different characteristics relative to UV protection, washablility, etc...
What I know about that 67 tail panel... the cars aroedimanics is its enemy.
If there should ever be a significant oil, trans fluid, other, leak, small spots of the fluid will collect on the tail of the car. In fact ,if the paint doesn't adhere properly at taped edges, air turbulence can pick it apart.
The same quality of exterior finish can be used on the interior applications where those elements are not a concern.
I've been stuck with indecision for a few months now, Tape out the piece on the car to repaint it or remove all those little nuts and remove the piece again to repaint it ?
First I have to decide, Remove the trans to replace its front seal or remove the engine to access that same seal ? Hope some of this helps