A fluid bed is a tube or box that has an air permeable membrane on the bottom. This is then inserted into a larger tube or box with an air tight fit. An air pump is then conected to the bottom container. Air is puped in to create pressure that then flows through the permeable membrane and aireates the powder coating.
http://www.crappie.com/crappie/pouri...bed-build.html
Welcome to TJ's Tackle
Jig & Lure Paint Supplier to the Fishing Tackle Industry - CS Coatings
That should give you an idea and explain what I missed or scrambled into something incomprehensible.
I love taking my kids fishing, now if I could just manage to fish at the same time.