Dual Snorkle repaint ?'s

I took the original mopar dual snorkle off my 73 Dart Sport hood and want to put it on a different hood, I would like to refinish the scoop first. I want to paint it semi-flat or semi-gloss black (I'm not sure of original paint).

Any body guys have recommendations on sanding, painting the scoop, I think it is plastic?

I would sure appreciate it.