Jim Fischers 2001 remarks and tips on Dr. KAMRAN F FAKHIMZADEH powdered sugar experiements from Bee-L. and his article on Powdered Sugar Dusting in the Virginia State Newsletter Winter, 2005 , page 2.
You can see more of Jim Fischers articles here.
Peter Edwards, Newletter editor for STRATFORD-UPON-AVON & DISTRICT BEEKEEPERS' ASSOCIATION wrote this article on using Open Mesh Boards.