Painting the RP5 backplate?

I'm definitely thinking about buying the Retroid Pocket 5, mostly as an upgrade to my RP3+ from a few years ago.

And one thing I'm considering doing is buying an additional backplate (clear) and painting it. I'm considering either beach glass spray paint, glow-in-the-dark blue with green splatter or something with hydrodipping.

Does that sound possible and if so, what kind of paint should I use? Not just type but also possibly brand, technique and color.

And before you ask, the 16-bit style. Whether or not I try swapping out the buttons remains to be seen.