How can I add another shelf to this old bench?
I am unsure of what exactly this bench is made of-some kind of steel. It is magnetic which is why I think it's steel. I just want to add one more row of shelving. the actual shelving should not be an issue, but I am not sure how to add a row- would I need to use nut and bolt like the main ones? All "remodel" issues are welcome, painting , drawers, etc.
the two main shelves are bolted in. Wondering if I will need to do the same for another shelf, and what is the SIMPLEST and CHEAPEST way of doing this. Do I need a certain type of corner brace?