They look good, thanks for taking the lead on this project and bringing it to the forum!
Since they are still pre-production, here is what I’d like to see in the final design.
The front edge and the top match and follow the shape of the car perfectly. The bottom and the rear edges do not. Rather than keep each louver perfectly symmetrical, modify each louver’s shape slightly so that they extend and match the lower and rear edge of the body lines.
Also, instead of that smooth edge all around the louver, how about an edge that looks like more like a rail? (for a finished, high end look)
And I agree; a smoother paintable finish would be preferable, so they look more like aluminum louvers.
Just my humble opinion... thanks again!
