I just got a roll of Apollo () brand blackwrap the other day. I've never used blackwrap before, but I have used aluminum foil! It appears to be similar stuff. I was wondering if there were any general practices or techniques I should know when using it though. The Dept Head got it to contain some "spill light" from a few lights I've placed on the house balconies. (6x22, PAR64) Do I need to physically attach my blackwrap to an instrument, or when I bend it around, will it stay on? Any other blackwrap thoughts?