ive brought some gloss black self adhesive vinyl for my fish tank and stuck it to the back of the tank today, i managed to get all the air bubbles out but looking from the front of the tank it looks some what dull and more of a blue/ grey colour. so im thinking of buying some more and stick it to the inside of the tank. if i do this will it keep stuck on to the back of the tank ok or will it come unstuck? has anyone heard of anyone doing this before?