What about spraying the inside of the grow box with metallic paint?

I built a grow box about 3 days ago. I was going to paint the inside white. However, my brain hatched a different possible idea. What if I spray painted the inside of the box with a metallic (aluminum color) color based paint? Has anyone done this? Would it reflect better than the white?

go flat white only. no gloss. apparently it is slightly less reflective than using mylar. gloss and foil etc cause hotspots.

I'd stay away from paint... fumes sweat for months... bad on plants.. styrafoam scrap pieces reflect great...