I'd like to use it on the back wall of my garage, so when I put the car on wheel dollies and 90 it against the wall, it'll have a nice cushion that isn't obtrusive. I don't intend to actually bumper up to it, either, but accidents happen. Especially at my house.
Any old, used POS strip will be fine. I'll be painting the aluminum anyway, and the rubber doesn't have to "fit."