Closed Loop Graffiti?

This project was for my science and art class called Bioneers. For this project we had to pick a product to improve on. The outcome we wanted to achieve was to make the product more closed loop. Closed loop is when a cycle will flow and eventually get to the beginning again and start all over with the cycle. For example closed loop is when nothing is wasted so let's say we have a flower and a worm eats the flower and a coyote eats the worm and the coyote dies and decomposes letting nutrients go back into the earth to help another plant to grow.

The product I chose to make closed loop is Ironlak acrylic aerosol spray paint. I chose this product because I am a use and I wanted to learn more about what I am using and if there is any way to make it better and change the waste produced by the product. Currently when you buy Ironlak spray paint or any other spray paint you throw it out after you use it. When you throw out the spray paint it is going to a landfill to sit there for a long time and since their cans are made of steel and steel does not decompose then the steel with just be wasted and will just sit in a landfill forever.

I am proposing a way that you can recycle your old and empty can while also getting something out of it. I am thinking of a way that Ironlak can buy back the empty cans and for every can you get a spray paint cap, but if you turn in five cans you will get a free full can of paint. By us doing this we will reduce the steel waste and the waste of all the other materials that you throw out. It can benefit Ironlak too because then they wouldn't have to buy more materials they can just reuse all the materials on the old cans.