Design
So Banksy thought that the best way to do it would be to place the painting inside of a shredder and cut it up into strips. But how was he going to do that in front of a room full of people at an auction? Do that, while at the same time maintaining your secret identity? There was just no way.
That was where things got tricky for the rebellious artist. He consulted some close friends and they all came up with an idea together. They would make a special frame for the picture before giving it off to an auction. When the time is right, the frame would shred the painting.