Very interesting use of tools and art. I have several "broken" wrenches to the side because I want a "shop cart" that is made of them. I didn't read the "back story", but would be interesting to know if there was a "cull factor" in the selection of tools used. I really struggle with the notion of taking a good tool and re-purposing it in such a way. The quantity/volume appears high. It seems the tool's value would/should always be greater in the context of it's purpose/intended use. I think of the money to be made with a $1 wrench, .25 socket, $9 tape measure, $10 hand saw, a $1 screwdriver, or even with a #2 school-boy pencil alone. Without reliable tools to do my job I would be in crisis.
Then you consider.............. what if its some of the foreign junk out of the pawn shops.