You can buy it from Rio Grande in a 40 lb bag. It is great for drying off wet metal, absorbing excess patina from surfaces, and for storing special tools.
I often make several pieces at a time and go from the pickle pot, to the rinse sink, to the corn cob meal for a super quick way to dry pieces off in between steps. You can also use it right after applying a patina to avoid finger prints. I have also kept files in a bag of it during long moves and travel to keep moisture from creating rust spots.
The bag from Rio Grande is $45 and will last what seems like forever!
Learn more tips and tricks from Laura on fabrication, powder coating, and more in her Surfaces, Stones, and Designing for the Body workshop this summer!