As long as the skin doesn't add a significant amount of thickness, it should be fine for use with the FreedomCase.
Thanks again. I just ordered several vinyl print skins as well as clear (polyurethane?) skins for evaluation.
Some user threads showcasing skins (like here and here) mentioned that some brands such as Stickerboy use thick vinyl prints with extruded textures. If too thick, I may have to look to another skin vendor using thinner vinyl with flat print.
Not sure how thick the clear/transparent skins are, in comparison...