[pavel_lishin]

I wonder if humidity and steam would be a problem if this was done in a bathroom.

[asm]

We used construction paper to black out the back around the tablet. My guess is that the paper wouldn't like the humidity but the rest would be fine. Perhaps you could swap in some black plastic material that would work with spray adhesive.

[bennettfeely]

Wouldn't a coating of black spray paint work just fine?

[icebraining]

My Nexus 7 was completely submerged in running water, and only had a couple of drops inside the case - it didn't even shut off.