Be careful perforating this stuff- a friends' company refused to work with it after seeing the mold problems, years ago. They wouldn't even do it if the client begged, offered to pay more or offered to sign a waiver.
If it's in a very dry place, maybe it can be your call, but I would look for solid material to mount on.
My mechanic told me, "I couldn't repair your brakes, so I made your horn louder."
