I may have Access to a Ceramic Kiln, and was thinking about making my own Custom Frag Racks. They would hitch hike on a firing. Are there Saltwater Safe Magnets for Sale on the Internet. Also I doubt a magnet would survive a firing in a Kiln. I’m guessing the Kiln Owner will know how to create the opening in the Frag Rack, for gluing the magnet in place. Looking to see if anyone else has done this.