Has anyone here ever used Krylon's "Looking Glass" paint kit? It supposedly will allow you to make any normal piece of glass "mirror-like". I can find lots of places selling it online but few who have actually used it. I'm considering using it to cover the backside of my aquarium. I had planned on just blacking it out, but something like this might make better use of the lighting for plants, keep the fish entertained, and make the tank look bigger. No Bettas will be involved 
The link:
http://www.krylon.com/main/product_...elid=8&productid=1764&content=product_details
The link:
http://www.krylon.com/main/product_...elid=8&productid=1764&content=product_details