Need advice for car spoiler?

I want to design a custom spoiler for my car and build it out of carbon fiber.
The spoiler will need to be cosmetically finished on all sides.
After I make the plug should I cut it in half around the perimeter and then make two molds, one for each half?
Infuse each mold and after cure bond the two pieces together for finishing?

Up until this point my resin infusion is limited to only one side being finished such as interior car panels. So doing something this complicated is new to me, any advice is appreciated.

Sorry I have no advice, but I am in for the tips!

you could just make it out of foam and laminate fiberglass or carbon after. This would be the easiest way unless you want to do production after. I have done this before. In fact I have some photos I can share if I find time to upload them on here

I want to be able to reproduce them later so I need a mold.

I thought someone would be able to offer some suggestions.

The spoiler would not look like the one in the picture although something similar.

How would you mold it?