if you dont know how to put window tint it will come out horrible. also you will need a really dark tint or mutiple layers. if you mess up one lay the whole thing gunna look like crap.
I have used spray paint, black plastic, black sheets, tint and interior house paint. My vote is for black plastic. Once you get it placed on hit it with a blow drier and it will shrink a bit and it gives a nice look