I just looked at my BMW direction sheet for the clear bra.
It only says not to use a pressure washer near the bra film. For cleaning it says use a mild shampo (Johnsons & Johnsons baby stuff) and a plastic film polish for scratches. For removing the film it says to use a hair dryier/heat gun and some isoprobyl alcohol.
It only says NOT to use gasoline - as that can age the film and harden it.
Couldn't you use some goo-gone stuff? I don't know what else to tell you?
bye,
David
Here is the BMW directions. Btw I still have not installed mine yet.