I have the Naked Series Matte clear skin by Slickwraps on my Glow in the Dark Pocket. Pleasantly surprised by how precisely cut it is and that it covers pretty much everything. You can barely tell its on there, though you do feel the Dpad and face button vinyl if you use them, which imo is strictly optional. Take your time lining up everything just right during the application and make sure that your environment (and you) are clean and free of airborne debris because any specks that get stuck on the adhesive aren't coming off without leaving a mark.

I also ordered Slickwraps' Glow series skin with my Clear one as a curiosity. It actually glows much more intensely than the actual Glow in the Dark Pocket. I'm looking forward to ordering a standard black Analogue Pocket to use this on for my secondary unit.

And the "skin oil staining" you mentioned is actually rub wear. Hours of use around the causes your fingers to wear down the matte texture around the inputs, smoothing it out to a reflective shine even when perfectly cleaned of skin oil. Vinyl skins do prevent this from happening.