I found an old 6'x8' book shelf sitting beside a bunch of trash cans on trash day in Greensboro, and threw the shelf in the bed of my truck. I cut off the bottom and mounted it to the wall above my microwave.
I use the shelves for plastic molds, colorants, flake and additives. I drove nails in the face of the shelf boards and hang my lead molds from those.
There's a bunch of everything from bone saws to plastic welders for my kayak on it too, but it's predominantly for baitmaking.
Honestly, most of my storage is someone else's junk I repurposed. My paint and solvent locker is a freezer that was hit by lightning. It's airtight, and has a lock to keep the kids out. I'll try to upload a picture of the shelf later.