Well a number of comments told me I was breaking the law with having the sticker on the inside of
my window, and that I may get a ticket.
So I decided to re-engineer my bumper sticker to be,
Just THAT a Bumper Sticker.
This Instructable is showing how I mounted it on the bumper of my car.
Making it, and adapting the power was well explained in the other instructable.
Step 1: Removing the Bumper
depending on your car, it may be as simple as drilling and reaching around the back
or in my case removing the complete bumper assembly from the car.