That's the way to roll if you're powder coating jigs. I have read umpteen posts on here and all over the Interwebs about making fluid beds and ran across a post on another site where a guy posted that he'd been coating jigs with powder and a fluid bed for 8 years and had finally come across the perfect diaphragm material for the fluid bed. Tyvek. Well, I thought I'd try it and it worked beautifully. It's easy to use too. Just use PVC glue to glue it to the bottom of your short section of PVC.